All right, you may be able to navigate with your keyboard and successful reset your resolution, although this may vary.
Once you know Windows has loaded successfully, right click your mouse, this should hopefully right click your desktop. Hit the up arrow on your keyboard and press enter. This should hopefully bring up your properties.
Now, if you have the default theme installed, you should only have to press TAB four times, however, if you have a custom theme installed, you will have to press it five times. This should bring you up to the tabs, in which you can press the right arrow 4 or more times to bring you to the settings tab.
Press tab three times, then press your left arrow multiple times. Then press enter and that should hopefully have gotten it.
Intel C2D E6320 / AMD Athlon X2 3800+
Gigabyte 965P DS3 / DFI nF4 Ultra-D
2GB OCZ Gold PC2-6400 / 2GB OCZ Gold PC4000
eVGA 8800GTS 320MB / eVGA 6800GS 256MB
150GB Raptor / 74GB Raptor
2x500GB / 320GB
OCZ GameXStreme 850w / OCZ StealthXStream 600w