Way to force 800x600

Looks like Median XL by default uses 1024x768 resolution. I've tried editing settings in the Glide settings applet, including the "static size" drop down to change it back to 800x600, but to no avail. Is there no way to force a lower resolution?

Dont think so, Why would you?

1024x768 is too small for Diablo 2. That said, I've noticed that the mod removes the "perspective" graphics mode and the UI is sized specifically for this resolution, so I'm going to guess it's not possible, or it'll make the game look worse. No worries!