I use swap magic and open loader to play ps2 backups on my 3.55 bc ps3 system. Not any way on 3.55 to play backups as the psx emulator doesn't work last time I tried but I can use it just fine on my 3.41 system I use cdrwin to rip to bin & cue images. For my ps2 games I use imgburn to rip to iso even the cd based games as open loader doesn't detect bin & cue image games. Hope that helps some.
PS3 CECH-2501A [CFW] & CECH-3001 [OFW]/ PS2 SCPH-3901 & SCPH-7501/ PS1 SCPH-5501
Mod Cobra 4.46 v7.00 w/ E3 Flasher [CFW] & Cobra ODE 4.50 [OFW]/ Mod HDD-OSD [Phat] & Modbo 4.0 [Slim]/ Mod MM3
HDD 1tb [CFW] & 640gb [OFW]/ HDD 640gb & OPL v0.92 w/ 1.5tb SMB