Since you only have two posts in your post count, it would make more sense to create a new account instead of requesting a mod to change it... Probably if you PM a mod, he/she will say the same thing.
If you try to change resolution thru registry, it will require reboot to take action, unlike using the control panel... Anyway, see *www.tomshardware.com/forum/170178-46-display-resolution-setting-registry for some guidance... If it doesnt help, post again and we can check out more alternatives...
Arun