I don't know if it will be useful on other peoples systems but I've posted the
Artmoney table file I created using the
method described in the need for speed thread.
Get the file
here (right click and save-as).
Use as follows:
Load the file into artmoney,
Launch the game in 800x600,
Alt-tab out,
Choose Prince of Persia process from the artmoney "Select Process" box.
Change all the values at 800 to the res width of your choice and the values at 600 to the height you want (select the lines and press alt-e).
Alt-tab back into the game and you should be in the correct res.
It worked for me :-)
If you have problems using the artmoney table file I've posted follow the full instructions in
this thread to create you own. The instructions are for Need for Speed but they work fine for PoP.