Thanks to those who helped with this little project, selling me bits and pieces and giving advice and pointers - you know who you are. I now have a pile of PS2 games that never need to be removed from their boxes. ;-)
GOW1, GOW2, RE4, Singstar games, Shadow of the Colossus, etc. all working fine.
Finally, can anyone tell me how to change the language from German to English on MGS 3?! :-)