one user name for vbulletin and aMember

[chiselneck]

Well, I've searched for the answer on aMember and vBulletin and found none... I may be looking in the wrong place, but can someone tell me how to:
set up amember so when a new user account is created they can use their amember user name and password to access vbulletin forums?

one username & password for amember & vbulletin.

Thanks

PS: I know this may be better suited on the amember forum and it is posted there as well, but I thought I'd ask here too.