UBB.threads PHP Forum Software Community Forums Resources and Customizing How Do I? Must View Ad Island - Function Code?

I already have those set and using it. Paid subscribers custom group is the only group with permission set to 0 for Must View Ad Island. I was looking at having the ads I have in the HTML Includes for Default Header and Default Header follow the Must View Ad Islands function by inserting PHP function around my Ads. This function currently only applies to the Ad Island between post 1 & 2. Could you point me to the file and line number for this code?