@rallyhard: If you use one of the newer OPL-Revisions, it isn't needed to modify those Rockband-ISOs at all.
Simply read it with IMGBurn and install/copy correctly.
Another thing,... IMGBurn's CD-Read/Write-Engine isn't that good.
IMGBurn is intended for DVDs and I suggest you CloneCD for CDs, especially PSX-Games...
PS2 V7/DMS3 V2 (FW:2.4b7); Seagate Baracuda 200GB
PS2 V7/CC1.0 (FW:34 hacked v2 BM:2.1.6); Maxtor DiamondMAX9 PLUS 160GB
PS2 SCPH-30004R; NoMod+NoLaser
3xSony MC 8MB
MAX/Datel 16MB with Boot-CD
Custom FMCB 1.8b+ Beta-Build, my AIO 0.5, Sony&xRhino-Linux