On silent, I believe that if you call V01 (enemy in disguise vsay) after the player has took your suit, the players name will show up as 'enemy in disguise'. If not, it'll just be the name of the player that you took the suit from.
The laptop I use for ET has HD integrated graphics and fps can range from 30-130 depending on the map. Fps is not stable for me. However, I think you should consider the processor because it might make a difference.