We have our photopost linked to a vbulletin forum. And PP uses the skin from the board and its userbase are shared. In our portal software (vbadvance) we have the banner system (vbulletin hack) and we globalice the variable "GAB_ads" for the banners to work. I believe we need to do the same here, but I dont know how to "globalice" the variable.
Anyway, It would also work adding a HTML code with the banner code. Because we just need one banner there and we dont really need the vbulletin banners hack.