Yeah, there's really only one tool out there that's reliable for putting those things together and its this: http://www.amazon.com/Tandy-Leather-Craftool-Press-3990-00/dp/B003CH9YQ4/ref=sr_1_2?ie=UTF8&qid=1313083596&sr=8-2
Too much $$ for me, which is why I never got it. Then again, if I knew how many snaps I'd be putting together back then, I probably would have sprung for it.