First let me say it wasn't a mistake as you'll have the laptop as long as you have the next two PC's you buy. I have to admit that though laptops suck for gaming, they RULE when it comes to lasting forever thus they cost a lot.
I will post a link for OpenGL Rendering. I think you should give it a shot as the picture is usually better and it is much easier on your system than D3D Renderer. Here you go:
How to use the OpenGL Renderer:
(Print this if you can)
1. Go to your C:\UnrealTournament\System folder.
2. Rename the file called OpenGLDrv.dll to OpenGLDrvOriginal.dll
3. Go to this link and download this zip file to your computer:
http://cwdohnal.home.mindspring.com/utglr/utglr23.zip
4. Unzip it and copy the OpenGLDrv.dll to the C:\UnrealTournament\System folder.
5. Start the game and from the UT Desktop select options.
6. Select Preferences.
7. On the Video tab, select the Video Driver "Change" button.
8. A “Change Video Driver†option window will open. Select “Yesâ€.
9. The “Unreal Tournament Video Configuration†window will open.
10. Click the radius for “Show all devicesâ€.
11. Highlight “OpenGL Supportâ€.
12. Select “Nextâ€.
13. Select “Next†again.
14. Select “Runâ€.
Done!
If it doesn't work well enough, just select the UT Safe Mode Start again and change your renderer back to D3D.