Can't get passed "A Few More Questions" SBOD

I purchased an iMac G5 model A1076 1g ram complete with OS disc minus hard drive from IUPUI. Purchased correct hard drive, installed it and it was running Leopard OS along with SBOD non-stop for any action. Long story short, I installed original OS that belongs to this unit and when I get to the registration page that ask A Few More Questions, hit continue poof SBOD, screen goes black after a bit and fan runs on high....any ideas? Thanks