I want to use the referral feature from vbulletin and have members invite members.
But where do i add which code so it isn't annoying, but still there.

like

"Invite a friend to this forum!"

in the footer? header? and how

http://www.vbulletin.org/forum/showthread.php?s=&threadid=59708

Erwin's Refer a Friend hack.

Works with sendmessage.php, I stick mine in the footer.

I put mine on ever thread

you can add it to the footer or quick links menu.
personally, i keep mine within the footer