I'm going through some old (circa 1999) backup discs and noticed that I saved an url with pictures on how to modify a Saturn. Shows how to install a switch so you can switch between USA/JPN/ or Euro. I'm not sure if this information is posted on other websites still, but does anyone want it?
The info is out their, but all the tutorials i've seen for it were poorly written, and either used no images, or ones that were difficult to make out.
I've always found this site to be very good regarding system modifications, and his Saturn one appears to be easy to follow: http://www.mmmonkey.co.uk/console/sega/saturnregion.htm
Thats far more difficult then the one that I did. However mine cant do pal. If you just want to do JPN/USA though then there is a far easier one where you just put 5 or 6 wires to the jumpers on the mobo and then run them stirght to a double poll/double throw switch.