Just yesterday I got my arcade up and running. I'm not going to lie, it has bugs to work out but I think I can get there. I purchased the IPAC keyboard encoder through www.ultimarc.com
as a suggestion from a guy on this forum. If you don't purchase the wires you will need to cut, strip, and crimp yourself. It's actually not that bad and you can 'customize' the wire lenght depending upon where you want to mount your IPAC. Anyway, my 1 player controls are working great, but when my family and I play a two player game I can not get the 2 player controls to function. I've tried everything I can think of but it's just not happening for me right now. They say in the instructions that it's a 'plug n play' device but I had to screw around with the programming. It's very straight forward so don't read too much into the word 'programming'. Have you purchased a keyboard encoder yet?