When I am doing a player edit the mouse sometimes freezes for up to 30 seconds, this is very annoying. Does anyone else have this problem? I'm sure it's not just me. Does anyone know how to fix this?????????????

If you have a N'vidia chip based card ( like Tnt2) download the detonator drivers from N'vidia ( see on the readme file of fifa2000 for the exact url). Normally that solves that problem.
If you don't have a Nvidia card, try to resize your desktop to 640x480 and put the game resolution equal (just for editing low res isn't a problem).
It's all I know about that particular problem.

best regards
Luís Carlos

P.S. Nevertheless, if you find a more pratical solution, please mail me.

Cheers mate. I do have a TNT2 card and you have solved my problem.