I got a Corsair H50 watercooling system now instead of the cruddy OEM fan. Originally the overheating message kept popping up due to the crappiness of the OEM fan, which is why I got this one. After reading a couple of reviews on how well it performs, I was thinking that I probably have enough room to OC.

However, I've never done this before and from tutorial videos, it seems like a risky business. So if anyone here has had experience on how to do this, that'd be greatly appreciated. Maybe some good sites to start at would help too.
I'm using the Q8300, Intel Core 2 Quad Core.