I almost bought me one of them from walmart,,then I found that yellow Trek..lol.
That build should be pretty straight forward other than the front mount may not reach the tube,,so you will have to use a plate with holes drilled and a 1 1/2" U-bolt.Then the hub brake arm will need to be tweaked a little so it wont hit the sprocket,and the dust cover on the hub will need to be trimmed to fit into the sprocket,,but your better off making the hole in the sprocket a little bigger,,i used a drill press with a round stone and did a couple quick circles at the same speed to make the hole a little bigger.Oh yeah,,and as mentioned,,high temp grease is the way to go,,these bikes only come with a light coating of cheap grease.If you go with bolt on,,I used a set of the dia-comp BMX Bulldog side pull and they seem to work better than most other side pull,,they are a little pricey though,,think I paid around $20 for one set.