Hello,
You know situation when you see "'No read file has been encrypted" message in mpps window? Yeah, some greedy tuner jealously guards his work. I have made simple software to decrypt file that was encrypted by MPPS. Just save dumped, encrypted file from mpps and use my decryptor. My program doesn't remove NOREAD flag from file, but you can simply do it by yourself with any hexeditor, but You must remember that will corrupt checksums!
http://adamk.pl/MPPSDecryptor.zip