I borked my computer! (swedish style)

[smoothness]

So, like my muppet title says, I broke my windows xp pro. I was playing around with a psone monitor, unplugged the wrong vga cable, and now I can't get the computer to recognize my DVI monitor as the main monitor! I still get a signal from the card to the DVI monitor - I see the boot screen and everything up until my log in screen. I've tried just booting the VGA, just booting the DVI, and booting with both the VGA and DVI plugged in, and none of them work. Any suggestions?