I've already had the USB devices out and zapped the pram and pressed the cuda switch. I have even taken the PRAM battery out overnight to fully zap the PRAM. As for the G4 card I would say it's definatly worth it I payed about 250.00$ and it's the 450Mhz with the 1MB backside cache. Very good card but hard to get it may take you some searching. would definatly recommend it.