First of all, before your gong ho enthusiam takes over, you should read
this article by our own OnDaEdg, about how critical the pelt clamping pressure is. Forget the thermal epoxy.
From a spare ATX PSU, you can fool it into starting, by shorting a couple of pins on the motherboard connector. You might want to go through the article on that one
.
Otherwise, I think you're on your way, except for that 150W pelt, because you'll find that you'll have a hard time cooling the hotside with an HSF, but hey, live and learn.
Here's a similar idea, by one of our own french counterparts.