1.   There are 4 body types... this is the only way I've found to vary the height/weight of the created player.

2.  Unless EA are hiding it... no.

3.  Unless I am daft... no...  You can only substitute... and it would appear only one player at a time.   This is a problem and hopefully EA will rectify this for Rugby 2006.

4.  As for kicking I found that on sideline or broadcast it's very difficult.  Classic 2 seems to be the most user friendly and with a little practice kicking becomes easy and an effective attacking weapon when parred with a good line out anticipation.  Just hold and press in the direction you desire.

Good luck... any more problems, or better suggestions from others Add away!