need help - Backup with no mod chip?????

[frogfish]

OK I'm havin some trouble here...
I have the PS2 (v.4) from the GT3 combo meal (35xxxx) and Game Shark v. 1.9

Is it possible to boot a burned backup without a mod chip installed? I can get it to load into Game Shark, then get the drawer open (knife / cog) and put in the burned disc but it won't start the backup. I've tried burning the ISO exactly as it was ripped, tried Bin2Iso on the image (to get to 2048 block/sector), and tried Addzer0 on the results of THAT. The first two discs I burned just froze the Game SHark start up screen; the one that I ran Addzer0 on went to a black screen but then nothing. I tried holding down the power button before I swapped the discs and that had no effect either.

I'm burning in Nero at 4x (max speed of my drive - should I slow it down?).. . I can't run CDRwin cause I'm in XP and it doesn't seem to want to do ANYTHING.

Any help would be much appreciated!

TIA