got REZ working again...I think it's a problem of me not knowing how to use it rather than a problem with the system (i.e. there's something special you have to do for psone games).
No offense, but some older model PS2s have problems with booting cd based disc. It appears this isn't the same problem, but do keep in mind that CDs not working isn't an uncommon occurance when it comes to PS2s.