I already have a site use btiteam source, then i want make a forum use SMF 1.1.5

[absolutevodka]

I already have a site tracker use btiteam source, then i want make a forum use SMF 1.1.5 integrated with site tracker.
I set up Forum , Now, i want reuse the user account from site tracker to login to my forum.
I see 2 table : users(site) and smf_member(forum)
Do you have to make with 2 table and modify the code of forum to resolve this problem.
Thanks.
Vodka.