what you need is a PAtch that converts PAL to NTSC and for a PAL version like yours...means you might find many patches that does PAL to NTSC but for different versions ..yours is PAL
step 1; check this site for a patch.....
http://www.megagames.com/psx/psx_patches.shtml
step2; look for NTSC PAL Selector + Fix Protection if any
( remember the patch has to be made from working on a PAL version like yours not made from working on an NTSC version... )
pacheeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeit