How to reinstall mac os x without erase boot camp?

Situation:Today, i was using mac os x this morning, it worked fine. then when i went home from work, start up the macbook pro, it took like 4-5 minutes to start the login, then take 30-45 secs, then the desktop starting to freeze!
Notes: I have Boot Camp on it.
Question: Can i reinstall mac os x without erasing the boot camp patition?
Thank you to reply!

Yes, if you think it's necessary you can hold c and boot off the installer OS X disk for your 10.6 and simply reinstall OS X and bundled programs right over the previous ones without it touching your files or other programs.
However, you should take ANY opportunity to transfer your files off the computer (manually, not via TimeMachine) just in case there is a bigger issue afoot, like a failing hard drive.
You might also want to take a look at the free OnyX, run all the maintainence and cleaning aspects and reboot.
Covers a ton of bases in one place.
http://www.titanium.free.fr/

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