Set the Active Boot Volume?

[k1down]

Happy New Year!
I have successfully installed OS X Snow Leopard (retail disc) to a Dell Vostro A90 using a 16GB USB stick. I can boot from the USB stick just fine. I have trimmed the OS X install to 6 gigs to fit on the 8GB internal SSD, which I have copied with Apples Disk Utility.

How do I set the Internal drive as a boot drive so that I can remove the USB drive from the system entirely.

Thank You
-k1down
If the details of the install method need to be more precise please ask.