I ue vBadvanced to do this but when I move to 3.6 I plan to try an approach like this....
You can see my site at:
http://www.timeshareforums.com
The trick was to include the vbA portal in all the pages that you want the vBA code added and in essence your forums end up being included as teh custom code... I figured it out over at vbadvanced.com but it has been a while...
Good Luck!