The key is likely in the binary... not fault of the program. REDMC actually does support this. Like with SunTrust, if you change the models etc or dimensions of the stadium in any way you have to export the new binary value and then import the change. Ads could be exported and re-added to the file in the end. I have some of this archived somewhere and I'll see if I can dig it up. A little foggy right now as far as the details.