I did this about a month ago, so feel free to PM me if you have any questions. The TWM instructions tell you pretty much all you need to know, and make sure you lube the pivot ball well. I searched until I found silicone grease but most guys just use regular automotive grease. Make sure its in a tub, not in a can. You might need some liquid wrench for some of the bolts also. Kartboy's website has install instructions for the bushings, and that install is mostly just a lot of pushing, pulling and cursing.
I would really recommend changing your gear oil (I swear by Redline MT90) and upgrading to a weighted shift knob. I use the Greddy Counter Weighted and it's like buttah. Happy installing!