Virtual PC: WinXP Mode @ 800x600 Rez?

[The Lord of the Flies]

I've d/led, installed, and updated the Virtual PC, WinXP Mode from Microsoft. But I need it to run in, or at least be able to be switched to, 800x600 rez when run in full-screen. I can't seem to change the rez while in it, though. This is its rez when I run it on my Win7 Pro, 64-bit system, and it won't let me move the slider-switch:



So what can I do to change the rez?

Thanks!

[The Lord of the Flies]

Aw, c'mon! You guys are smart! Surely someone must know a little something....

[Norphy]

The only way you're going to do this is to turn your Win7 resolution down to 800x600 and then run the virtual XP instance in full screen.

[Ryu Connor]

Disable Integration from the toolbar, fix the rez, turn Integration back on.