I've done it... Don't fear doing it like these other guys. It's easy.
Just make sure you have a whole weekend set aside to do it.. It's pretty straight forward, just takes a bunch of time to do it... But instead of sending it out and giving a guy $400-500 to do it, do it yourself.. It's hard to screw up.
I've never done one before and I just followed the word document that sage2k is offering you and it went very smoothly... Took me about 30 hours [No lie.]
I do highly suggest doing it yourself though.