I went to the MPH site and this is what I found. This is what MPH had to say
"Here the game loader 1.1 with support umd.
Because i have no time for the moment, the multiplayers and sleep bugs are not corrected for the moment, it will be for the next version.
The compatibility is likely to be reduced because decoding is performed in the loader and because of the memory I am limited (64ko) to decipher prx but the next version will not have this constraint."
Im not going to post the link but if you type it in google you should find it.