Macbook Pro hangs on start up

[STITCHES]

My late 08 MBP all of a sudden wanted to start hanging on start up. I've tried the usual's like reset PRAM and ran fsck -fy and it came back ok. I tried booting into safe mode and the bar loads, then it hangs after that.

When I insert my Snow Leopard dvd it reads it for a minute or so and spits it back out.

Weird thing is that I'm on the same laptop using Windows XP under bootcamp. It boots into bootcamp flawlessly. I tested the superdrive under windows using an audio cd and iTunes plays it with no problems.

So just in case I backed up what little data I had on it(everything else is on externals).

Can anybody help me out?

 

[simsaladimbamba]

Do you have any bootable or Time Machine backup?

 

[Peace]

Hold down the option key while booting then select OSX and see what happens.

You might have screwed up your boot.ini

 

[STITCHES]

I don't have a bootable or time machine back up.

Held down the option key while booting, selected OS X and it still hangs...
The boot.ini? Can I fix that from boot camp?

 

[Peace]

Boot into windows and select bootcamp from the menu on the lower right. Select start up in OSX.

See what happens.

No. The boot.ini problem isn't just a single file. Sorry I implied that. I meant the efi part.

 

[STITCHES]

Still hangs after starting up in OS X from bootcamp.