Looping after Install


After installing OS X by itself on a seperate hard drive, the computer reboots, loads the network, and anything else it needs.. then I get the spinning beachball or whatever it is.. and it keeps jumping from the left top corner to the middle, changing into a pointer and then back to the ball.. and it will do this forever.. and ever.. I've un-plugged my SCSI CD-R.. still doesn't work right.. I've reinstalled about 10 times now, and I get the same damn thing everytime.. Anyone know what's going on here???? Any insight?