Today Chinese PS3 developer chnps3hax released the Sonic Generations PS3 EBOOT Fix for 3.55 / 3.41 Custom Firmware
Download: Sonic Generations PS3 EBOOT Fix for 3.55 / 3.41 Custom Firmware
To quote, roughly translated:
Note: This game is the first generation with md sonic, the corresponding file is genesis.sprx this document did not turn over, so into that game theory may be out, but no one will play with the ps3 md picture of things it.
A brief guide is below:
1. Download fix files (EBOOT.BIN + PARAM.SFO)
2. Replace the original files with the ones in the download.
3. Boot with multiMAN (Select + X method) and Enjoy.