jj52786,
I made it easier (and safer) for you to make this change in the registry.
All you have to do is open the zip attachment on my post, and run the "WC3_1280_270.reg" file inside. This will automatically import the settings into your registry, without having to worry about messing anything else up.
(If you feel worried about it, you can open the .REG file in notepad and see that it just applies the settings I posted above.)
If you need any help, let us know.
- rp