1. Try to boot it in minimal mode, or isn't the CD recognized at all?
Then you must have made a fault with the CD. It has to be a PS2BootCD. Only the ELF on the CD is no good.
2. You can install the PS2Browser App (on the FW CD) via the App Browser to reach the original $ony Browser. But that's not good for your saves. The $ony Browser is crap!
Use LaunchELF to manage your saves. That's far better, and you can bachup your saves to USB or via network to PC. So all space probs are gone!
Dl my Custom BM v1.3 (link in my signature), cause it has everything you need inside.
best regards Jones23