ok well, i'd take a look at a few tutorials that are on felix's website- the address is in his signature. to model you'll need gmax, from
www.discreet.com , and the fs2004\2002 gamepack from microsoft insider (theres a link in this forum i think).
which FPS did you model for? I used to be a half-life modeller on a ww2 project, "the gate", and i did some other work too.
dano.