take a look at the details of this trainer it does also say RETAIL version may not work with any other version...download version is dif than installed from a cd version...
I just DL'd Steam's LFD, installed it and the newest trainer, made a custom key list, and it all worked. Win7pro on a Nvidia 560, so there is hope for fans of this great shooter! The ability to have unlimited pipe bombs was missed, but otherwise, a great game-balencer for me, and lets me get through the game; great fun!
Thanks for a great series of trainers.