Why are the games i am downloading off of my PSP Blender turning out to be corrupt when i put them on my PSP

You need custom FirmWare on your PSP to play iso files. PspBlender is kind of a scam. It just locates torrents for you. This is something you could do yourself. If you already have custom firmware, then there shouldn't be a problem. For help on putting custom firmware on your PSP, check some of the tutorials on youtube.com, and Dark Alex's website