How can I force my computer to use my AMD GPU instead of the integrated Intel Card?

I just reinstalled Windows 7 on my Dell Inspiron 15R SE 7520 and I'm trying to get the dicrete GPU selected. But even though I got the High Performance option selected on Catalyst Control Center, I can't get Skyrim to run on the discrete GPU. How can I get it working?

EDIT: I forgot to mention this is a hybrid GPU, it needs the on chip intel one to perform in any level... IMHO, a crappy design.

No guarantee to work (don't have a onboard card to test), but I'd assume the following should work:

• Go to [my documents]\My Games\Skyrim and open SkyrimPrefs.ini with your favorite text editor.
• Look for a line starting with iAdapter=. Actually it should state iAdapter=0. Change it to iAdapter=1.

Try launching the game again, avoid going into the launcher's settings.

insall GPU-Z run the program and select the graphic-card you want to use. you can set the program to open when windows starts up. In that way you dont have to manually open it everytime you wont to play.