Wow, what can I say.

Without going into great detail, if you are looking for a Multi Pac, from a guy who is a class act all the way, check this guy out.

http://home.everestkc.net/mdoyle/multipac.htm

This is a totally unsolicited opinion, I have nothing to do with the sales of these boards, I am simply a satisfied customer.
Mike offers a great product, and he backs it up!
He even returns emails quickly AFTER getting your money, unlike so many others in this hobby.

Like I said, a CLASS ACT all the way!

That's really cool.  I'm assuming you need a PAC board to start with?

A Pac or a Ms Pac, or several other types of boards which are way less expensive, like a Make Trax.
I bet if you emailed him, he has a list of the boards that it supports.

If anyone is interested, here's the response I got when I emailed Mike Doyle about supported boards...

===========================

Mike, thanks for the inquiry.  Our kit installs on a variety of boards- you're correct about the Pac and Ms Pac, and as for less costly boards it also runs on Make Trax, Pac1/Pac2, Eyes, Crush Roller, and Pac 3.  The manual details installation on all of the boards.

The kit is designed to easily support the various types of ROMs originally installed on whichever board from the list you decide to run, you can "strap" the kit to support the 25xx or 27xx series of chips with a jumper change.  That way you don't need to modify your original board in any way.