Acquire the following
2 spacers (left- 1.860" right- 1.500") these measurements worked for me. Can't promise they'll work for you, but it's a starting point, eh?
18 x 5.5 wheel + tire of choice
sprocket spacer- 9/16" I think
5 bolts for the sprocket
If you want a brake, go ask someone else for that info. I didn't do it, and have no clue what's involved.
Bolt all the big shit together:
Make sure your axle is long enough
Gather the rest of your stuff
Put the rest of it together
Button up the rest of what you took apart, take some pics, and tell yourself how awesome you are for FINALLY having the balls to do this painfully simple mod