Help with ISO's ?

This could be a repost I cant find my thread from earlier but, I recently just picked up a gig memory card, i have a few torrent files, NBA showdown, FIFA, and wipeout....but i dont know where to place them...i downloaded the Fastloader V0.5d and everytime i run it, it just says to take the umd out of the drive and then says acnt find any isos....any help would be appreciated. thanks