Having trouble re-loading Mac OS X to mac mini.

I recently recieved a hand-me-down mac mini which was in "server mode". I tried to re-load Mac OS X, choosing to archive the old server data just in case the original owner wanted it back. But after the first CD has run its course, the mini goes through a never-ending rebooting cycle. I tried to reload it last night and checked this morning and it would still reboot, go to the white screen with the white apple, then reboot again and repeat. I tried holding down "C", but all that let me do was re-load mac os x again and repeat the process.
When I manually shut the computer down and repower it, it again is stuck in the rebooting loop.
Please help.
Thanks,
e

These links will give you the info you need
http://support.apple.com/kb/HT1545
http://support.apple.com/kb/HT1773
http://support.apple.com/kb/HT2186
http://support.apple.com/kb/HT2956

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