a trainer is simply a memory hack for games that don't have cheats...like in Halo2..if you get the evox trainer then you can have unlimited health, ammo, can jump really high...stuff like that..
Btw do you use IRC? if so come join slayers...we're slayers 2.6 autoinstaller support and i'm a +v over there.. so come to
66.45.27.151 #slayers