Hi,
If you check back in the archive I posted a topic on this.
Basically, there are two different types. Check whether yours is the high or low voltage version (off the top of my head, around 5V or 9-12V). Basically, the higher is more common over here. Use a Mega Drive PSU and you should be fine.
Any more problems, my email address is eggplant_casserole@hotmail.com
Hope this helps <IMG SRC="smilies/smile.gif" border="0">