[psx]Monster Rancher 1 + 2 corrupted data? Problems?

I downloaded monster Rancher 1 and 2, actually i downloaded no.2 twice, so then i tried both again with my popstation gui, i kept trying then i noticed compression so then i only did 1, didn't work! tried compression zero on the bloody image, didn't work! so i don't get what to do... I don't leave the image and other two in folder and delete the finished file my psp says is corrupted, but every time it says it is corrupted! Please help...
P.S I've searched but can't find any old topics that help...
P.S.S If it is a problem with the game off romulation can i please have my points refunded.

I just tested all Monster Rancher files on the server and they're all working fine.

Any advice?
Am i doing anything wrong? Maybe it could be my PSP?

did you extract them from the 7z files?

Oh it doesn't matter now...
Something extremely strange happened, i can have the two files i need if i preview before eboot transformation and in mid-transformation drag and drop the files to a folder then i can keep them! Yay?!...
But thanks for the help anyway!