Need firmware for sunplus pmp with nes emulation
 

Where can I download a firmware for this player with nes emulation? MP4 Sunplus PMP-1600 SPCA536. I have a fake Foston PMP-1600((picture)
I have a backup firmware for this model without snes emulation, i want to flash my pmp with a new firmware including snes emulation.

And i also want to modify my pmp (change skin), but FRM Pro doesn't work, it detects my pmp (spca536) as a cam, but when i try to upload or download the files from the pmp, it fails.