Here is how to fix your problem:
Download XP SP2 Res Fix -
http://files.filefront.com/SH3+XPSP2.../fileinfo.html
Follow the instructions in the readme and then open d3d9.cfg
In d3d9.cfg:
Code:
resX=1280
resY=960
useFiltering=1
enableScreenshots=1
screenshotPath=.
Change resX and resY to required values and you are good to go...