Problem booting osx and osx install dvd after windows xp install

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I have a macbook pro running snow leopard. I just installed windows XP. The windows XP partition starts up fine, however when I try to boot into osx, the little loading spiral just spins endlessly. If I try to boot from the snow leopard install disk, the apple sign comes up but no loading spiral comes up, and nothing else happens. I've tried booting into single user mode. In single user mode, when the screen reads ":/ root# " I tried running fsck -hl and it says I have an Invalid sibling link (4, 995). Then it says Macintosh HD could not be repaired. How can I get my macbook to boot up into OSX?
Thanks
 

bobtomay

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Your Mac's Specs
15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '14 1.8 i7 8GB 10.11; 21" iMac '13 2.9 i5 8GB 10.11; 6S
Try this - but you're going to need to boot from your startup disc.
 

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