1) Proper category_game_tool2.xml required to enable PS2 disc icon in XMB/GAME column in jailbreak mode
2) Original PS2 game required
3) Original PS3 game required
4) PS2 backup extracted in one of the folders where multiMAN looks for games (usually with your PS3 backups)
1) Reboot your PS3 in JB mode
2) Put original PS3 disc
3) Launch multiMAN and mount your PS2 game backup
4) Replace the PS3 disc with original PS2 disc
5) PS2 disc icon should appear in GAMES column. Try to launch it.
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