Can't install on iMac 20"

Having major problems installing SL on my iMac 20". I checked the Hard Drive and there are no errors, I also repaired all permissions on the disk and I'm still having the same problem. Here's what happens:
Install starts fine, says it will take about 58 mins for upgrade, it then reboots about 10 mins in and says install will continue after reboot. After reboot, the SL disk ejects and nothing continues. About this Mac still says OS 10.5
I disconnected all external drives, shut down my Mozy automatic backup and am now out of ideas --- can someone shed some light for me?
Thanks in advance for your help.
John

Figured it out ---- the culprit was my wacom bamboo. Evidently everything needs to be disconnected from your iMac before you install SL, including mice and keyboards that are not apple....With that said, the only thing connected to your iMac before installing should be the standard apple keyboard and mouse.
Once I disconnected my wacom and reconnected the standard apple mouse, everything went smoothly and I was upgraded with no problems in about 50 mins.

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<Edited by Moderator>

"has forgotten the password"
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If you get hold of a retail OS X disc 10.2 or later (but not 10.5), BSD is available from the installer as an optional installation (with the main OS). It's unlikely the previous owner would have installed it however.
Can't help you much further than that I'm afraid, but I'm sure there'll be another bus along in a minute
Message was edited by: noondaywitch

Can't install on iMac 20"

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