thanks. I have the additional 24V PSU that is shown in the listing at least. as far as stepper drivers, I have some left over ULN2003 drivers, would those work? assuming they don't, how about this model? actually it looks like I can get the model you're talking about for cheaper anyway, but I'd still like to use the ULN2003s if I can.

also I'm still a bit confused in regards to the connection to the old interactive board. I get that GND goes to G and L-AN1 goes to in, and that I don't need the 5v or the LPWM1 connections, but what about the P- and P+?