Currently Being ModeratedJun 6, 2012 8:15 PM (in response to Switcher1939)
Don't worry. It's easy to solve. Here's how.
Currently Being ModeratedJun 6, 2012 8:17 PM (in response to Switcher1939)
You would have to boot up with your Snow Leopard install disk to re-partition the drive, which will erase everything on it. You have to select the Partition tab, click Options, and set it to GUID.
Installing Lion on an external and booting from that for a while might be a better option so that you can see how it works, first.