OR... you could take it toa real proshop that has people that know what they're doing and do it up right. That's worth a few bucks.
davidmil is right...I got my bow online but took it to the local pro-shop and they treated like one of the regulars, because they knew I'd be back for other things, and have for most of my needs. When I do get a new bow I'll go see them first..ya know, that hindsight thing.