Macbook pro : error loading operating system

So my problem is an interesting one. This was setup with bootcamp with xp and oxs 10.4 originally if I recall correctly. So I went to go back into the mac side and it failed to boot. I couldn't find my boot cd for some time so she sat. Then I found a 10.5.1 disk and she'd boot with it but couldn't mount the hard drive for tests or anything. I was able to wipe the drive and then mount it. But doing so wiped my mac partition, and the disk I was loaned wouldn't do the install so I went down to the mac store to buy brand new copy of now leopard... Got home and the drive don't recognize it. There is a dvd drive in this macbook pro, and I can through in an xp cd and it reads it fine but the funny thing is that now it also will no longer read the 10.5.1 disk I used to get to disk utility before. It just kicks it back out. So anyone got any ideas? It will read an xp boot installation cd. But not a brand new snow leopard or even the older 10.5.1 disk it was just reading fine. Thanks again in advance for help.

!http://i46.tinypic.com/2nvn6f.gif!
"I couldn't find my boot cd for some time so she sat. Then I found a 10.5.1 disk and she'd boot with it but couldn't mount the hard drive for tests or anything."
"the disk I was loaned"
"so I went down to the mac store to buy brand new copy of now leopard... "
You need to locate your System DVDs that originally came w/your computer. You cannot use System DVDs from one mac to another because they are _*machine specific.*_ More than likely, it is probably the reason why the retailed purchased DVD did not work.
You can get replacement System Install & Restore CD/DVDs from Apple's Customer Support - in the US, (800) 767-2775 - for a nominal S&H fee. You'll need to have the model and/or serial number of your Mac available.
!http://i50.tinypic.com/izvwo1.gif!

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    Elton Ji
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