I hope you don't mind that i will be barrowing your topic for a question of my own seaney, it just didn't feal right making a new topic for the exact same question.
Anyways, what about a chip? I found one for like $5 at this site here:
http://www.modyoursystem.com/playstation1modlink.html
another for 6 here:
http://www.xinga.com/shop/show.php?product=PS2180 (has, US/JPN/UK bios)
I don't see a playstation version, but it is the same chip used for all other mods. Any other ones that cheap, with more info about the chip?