I'll be making a gamefaqs for this it is fairly easy to find most missing players, most players are already in game just match up gk stats. If not just look at rosters from 2009-2010. Any mistakes let me know but I've got England, Ireland, Italy, France and Scotland so far. Currently working on Canada, Argentina, Cheetahs, Wales. As well, when renaming the rosters you have to go the edit player a second time and reenter the commentary name for it to take effect.
I'm sorry if the format suck but I am pasting from a word file and had to include symbols to find them easily:
England:
Dan Cole PR 71 (89) ENG (### addison thorpe)
Andrew Sheridan PR 66 (93) ENG (### steve allen)
Matt Stevens PR 65 (85) ENG (### garbiele shoemark)
Tim Payne PR 60 (91) ENG (### darren schofield)
David Wilson PR 59 (91) ENG (### rudi cheeseman)
Paul Doran-Jones PR 57 (89) ENG (### ronald wright)
Alex Corbisiero PR 47 (88) ENG (### george Gannon)
Dylan Hartley HK 72 (84) ENG (### mark barrett)
Steven Thompson HK 65 (92/90/Break 81) England (### calum beattie)
Lee Mears HK 62 (85) ENG (### ian long)
George Chuter HK 58 (77) ENG (### andy clarke)
Courtney Lawes SR 86 ENG (### gaetan day)
Tom Palmer SR 67 ENG (### dave ingle)
Dave Attwood SR 65 ENG (### luther kelly)
Simon Shaw SR 65 ENG (### sanjay parkins)
Steve Borthwick SR 63 ENG (### shaun higgins)
Louis Deacon SR 61 ENG (### tom bell)
Tom Croft FL 86 ENG (### john mercer)
Lewis Moody FL 81 ENG(### billy cox)
James Haskell FL 79 ENG (### sam brookes)
Phil Dowson FL 77 ENG (### bob robson)
Joe Worsley FL 75 ENG (### jonathan Kohn)
Tom Wood FL 72 ENG (### kevin webb)
Steffon Armitage FL 72 ENG (### johnny matthews)
Hendre Fourie FL 67 England (### alex parr)
Nick Easter N8 79 ENG (### callum farrell)
Dan Ward-Smith N8 71 ENG (### gary slateR)
Ben Youngs SH 81 ENG (### roger springgay)
Danny Care SH 75 ENG (### benjamin whitehead)
Richard Wigglesworth SH 69 ENG (### tom watson)
Paul Hodgson SH 65 ENG (### gareth Biggs)
Jonny Wilkinson FH 85 ENG (93)94) (### jp shillington)
Toby Flood FH 81 ENG (### lewis tinckell)
Charlie Hodgson FH 76 (k84/gk86) ENG (### richard cannon)
Brad Barritt CT 78 ENG (### richard toner) commentary name barrett
Mike Tindall CT 76 ENG (### phil trinder)
Anthony Allen CT 75 ENG (### jp spachuk)
Riki Flutey CT 75 ENG (### karl stephenson)
Shontayne Hape CT 74 ENG (### max wulf)
Dan Hipkiss CT 71 ENG (### courtney brooker)
Dominic Waldouck CT 70 ENG (### Ma'ama Moon)
Mark Cueto WG 87 ENG (### josh lewis)
Chris Ashton WG 85 ENG (### ryan hamer) edited stats from 82 gave a speed boost
Matt Banahan WG 82 ENG (### rhys hobson)
Ugo Monye WG 79 ENG (### rodd freshwater)
James Simpson-Daniel WG 77 ENG (### ed skuse)
David Strettle WG 76 ENG (### stephen hawkins)
Ben Foden FB 88 ENG tackle boost (### chris hall)
Delon Armitage FB 78 ENG (### pascal pilgrim)
Mathew Tait FB 74 ENG (### andrew leck)
Ireland:
Tony Buckley PR 70 (91) IRE ($$$ gavin fitzgerald)
Cian Healy PR 68 (87) IRE ($$$ eoin mccarthy)
Marcus Horan PR 64 (83) IRE ($$$ ben murchie)
Brett Wilkinson PR 63 (82/89) IRE ($$$ dan stowers)
John Hayes PR 62 (87) IRE ($$$ gareth winkler)
Mike Ross PR 58 (89) IRE ($$$ jonny satala)
Tom Court PR 58 (91) IRE ($$$ dennis reed)
Sean Cronin HK 66 (61/83) IRE ($$$ keith stringeR)
Rory Best HK 63 (83) IRE\ ($$$ nevin o'sullivan)
Jerry Flannery HK 63 (68) Ire ($$$ duncan o'leary)
Damien Varley HK 58 (83) IRE ($$$ paul mcgowan)
John Fogarty HK 58 (67) IRE ($$$ nigel harris-wright)
Paul O'Connell SR 80 IRE ($$$ callum berne)
Donnacha O'Callaghan SR 75 IRE ($$$ trent barker)
Mick O'Driscoll SR 65 IRE ($$$ cillian fogarty)
Dan Tuohy SR 65 IRE ($$$ alan mccrea)
Donnacha Ryan SR 63 IRE ($$$ gavin mccormack)
Leo Cullen SR 63 IRE ($$$ gordon o'sullivan)
Ed O'Donoghue SR 60 IRE ($$$ ryan jennings)
Devin Toner SR 55 IRE ($$$ felix o'mahoney)
Sean O'Brien FL 68 IRE (needs edit to about 85 ($$$ cian o'donnell)
David Wallace FL 84 IRE ($$$ conor caldwell)
Stephen Ferris FL 80 IRE ($$$ fergus mcgrath)
John Muldoon FL 70 IRE ($$$ kyle o'mahony)
Shane Jennings FL 70 IRE ($$$ jerry o'malley)
Rhys Ruddock FL 70 IRE ($$$ denis muldowney)
Kevin McLaughlin FL 70 IRE ($$$ mark holland)
Declan Danaher FL 66 IRE ($$$ nigel mccomb)
Jamie Heaslip N8 81 IRE ($$$ paddy o'leary)
Denis Leamy N8 78 IRE ($$$ jack sweeney)
Chris Henry N8 69 IRE ($$$ sean wade)
Tomas O'Leary SH 80 IRE ($$$ aidan mclaughlin)
Eoin Reddan SH 76 IRE ($$$ robbie spence)
Peter Stringer SH 73 IRE ($$$ mike nutbrown)
Isaac Boss SH 69 IRE ($$$ stephen ruddock)
Jonathan Sexton FH 82 (GK88) IRE ($$$ sean coughlan)
Ronan O'Gara FH 77 IRE (K95/GK 93) ($$$ shane o'malley)
Brian O'Driscoll CT 94 IRE ($$$ adam dowling)
Tommy Bowe CT 88 IRE ($$$ geordan duffy)
Keith Earls CT 84 IRE ($$$ christian danaher)
Gordon D'Arcy CT 83 IRE ($$$ stephen deasy)
Andrew Timble CT 77 IRE ($$$ jamie o'donohoe)
Paddy Wallace CT 73 IRE ($$$ shane archer)
Luke Fitzgerald WG 79 IRE ($$$ damien faloon)
Shane Horgan WG 78 IRE ($$$ aaron o'donnell)
Johne Murphy WG 68 IRE ($$$ tommy keogh)
Ian Dowling WG 65 IRE ($$$ darragh stringer)
Rob Kearney FB 85 IRE ($$$ shane fogarty)
Geordan Murphy FB 83 IRE ($$$ conor jennings)
Gavin Duffy FB 74 IRE ($$$ brian halai)
France: (was a pain as the player overalls were different from in game most are matched up with GK stats)
Fabien Barcella PR 72 (86) FRA (@@@ deon virzi)
Jean-Baptiste Poux PR 63 FRA (@@@ antoine lavorgna PR 70)
Thomas Domingo PR 71 (91) France (@@@ sibusiso D'aram de valada PR 69)
Nicolas Mas PR 71 (85) FRA (@@@ serge lugstoone PR66) may be another player but nicolas mas needs to be in france and needs a stats boost. Age and hieght weight almost match.
Sylvain Marconnet PR 67 (75) FRA (@@@ charlie mjekevu PR 65)
Jerome Schuster PR 65 (83) FRA(@@@ gaston laurent PR 62)
Luc Ducalcon PR 63 (91) FRA (@@@ jean-pierre Lavalla pr 60)
William Servat HK 77 (88) FRA (@@@ Possibly jacques dickins HK 75)
Dimitri Szarzewski HK 80 (86) FRA (@@@ vassili Labbe HK 74)
Guilhem Guirado HK 69 (82) FRA (@@@ eliota testa HK 62)
Benjamin Noirot HK 61 FRA (@@@ luke percy HK 58)
Lionel Nallet SR 78 FRA (@@@ poss pahael girard SR 75
Gregory Lamboley SR 72 FRA (@@@ christophe rank SR 67)
Romain Millo-Chluski SR 71 FRA 38.24 (@@@ benoint howse SR 67)
Julien Pierre SR 67 FRA (@@@ emilien legrand SR 64)
Jerome Thion SR 69 FRA (@@@ miles soward SR 63)
Pascal Pape SR 68 FRA (@@@ joe garnier SR 63)
Thierry Dusautoir FL 87 FRA (@@@ nicholas moreau)
Julien Bonnaire FL 81 FRA (@@@ simon Perrotta FL 78)
Alexandre Lapandry FL 75 FRA (@@@ Thomas grosso FL 71)
Wenceslas Lauret FL 67 FRA (@@@ yves deysel FL 71)
Fulgence Ouedraogo FL 72 FRA (@@@ pierre-gilles sidoli FL 68 )
Imanol Harinordoquy N8 88 FRA (@@@ jean-charles Dacey)
Sebastien Chabal N8 83 FRA (@@@ djibril guerin N8 85)
Louis Picamoles N8 80 FRA (@@@ poss Tristan balano N8 82)
Dimitri Yachvili SH 82 FRA (@@@ pedro lebrequer SH 81)
Morgan Parra SH 79 FRA (@@@ julien telefoni SH 80)
Julien Thomas SH 68 FRA (@@@ pierre paulo SH 63)
David Skrela FH 83 (85/84) FRA (@@@ felix tondout)
Francois Trinh-Duc FH 83 FRA (@@@ remy parker FH 81)
Fabrice Estebanez FH 81 FRA (@@@ yoan fruean\ FH 78)
Frederic Michalak FH 75 FRA (@@@ jordan galinovskiy FH 75)
Yannick Jauzion CT 88 FRA (@@@ rabah Nicoud CT 89)
Aurelien Rougerie CT 83 FRA (@@@ aretz portier ))
Damien Traille CT 80 FRA (@@@ philemon rogers CT 81)
David Marty CT 77 FRA (@@@ benjamin power CT 78 )
Mathieu Bastareaud CT 81 FRA (@@@ ludovic campomar CT 76)
Maxime Mermoz CT 80 FRA (@@@ sone facundo CT 75)
Lionel Mazars CT 67 FRa (@@@ tana nauroy CT 68)
Marc Andreu WG 81 FRA (@@@ arnaud chavhanga WG 80)
Cedric Heymans WG 80 FRA (@@@ cornell kluchnikov WG 79)
Yoann Huget WG 73 France (@@@ pascal barbieri WG 77)
Julien Arias WG 76 FRA (@@@ chris loursac WG 77)
Vincent Clerc WG 77 FRA (@@@ WG 74 Lionel Chamberlain)
Julien Malzieu WG 78 FRA (@@@ serge girard WG 73)
Benjamin Fall WG 75 FRA (@@@ piere lamacusa WG 71)
Maxime Medard FB 80 FRA (@@@ warren reynolds FB 82)
Jerome Porical FB 82 FRA (@@@ mehdi chateauraynaud FB 82)
Alexis Palisson FB 81 FRA (@@@ yanis sabina FB 81)