I think the posts are buried in the PSX forum because the exchanges all took place before it split out into PS2.

Anyway - I've never found the NTSC to PAL patches any good. So I cut out the crap and went to Maplins and bought for £60 an NTSC to PAL convertor. So I play unpatched NTSC games (subject to protection limitations) on my PS2 with the convertor in the AV line to the PAL TV. The convertor is removed for PAL games (which would play B&W with the convertor in). THIS WILL SOLVE YOUR PROBLEM.

Others have said that the fully loaded PS1 SCART AV lead will properly convey the NTSC signal to a PAL TV so that it plays in AV mode. You could try that first.