Yes, pretty much - there's apparently (on the 1.6 2000's) an antitheft pin, I can check around and figure out if there's anything you have to do, but it's just moving one wire.
The link in the top of the thread tells the circuit you would have to make to put it in your car, check out the great AC faq to find the circuit for the AC, jason's thread (or mine) for a couple ways to tackle the AC problem, it can be done stand alone - the board is really just to make it easier and more reliable.
That said, I get $100 (US) + shipping + paypal fees (4% I think) for a kit which has everything you need, building it is no harder than building a MS. I don't really want to build them, and I think you'll understand the system better if you build it yourself, but I can and have assembled them if required - and I charge for that as well to discourage it. That said, internet tech support is free and believe me, people have been taking advantage of this. :-)
Most people have been making a cable to go between the two cards, which I'm not a fan of. It has worked well for two people, and another one messed up his cable and his car didn't run - but I fixed it for him so he should be up soon. Another guy plugged it in directly, but kept fouling plugs because his engine has no rings. :-P
PM me if you want more info. If you have everything for making a piggy, you can extend the stock harness and mount the computer and adaptercard behind teh glovebox, and give yourself a lot more foot room. I'll try to get a pic of that set up next week.