I am trying to find a BTS version of the destroy building/abandon city mod. I found the vanilla one here (http://apolyton.net/dir/index.php?sid=829126135&id=4975&t=reviews&toprate=5.0000&tophits=6172&cat=354), and took the parts that were tagged as being changed and put them into the CvEventManager.py for BTS. Than when I press ctrl+d in one of my cities, I hear the sound popups make when they open, but it didn't show up.

Any advice on this would be great, thank you.

Does anyone have any hints as to how I can go about fixing this problem?

I felt your pain. I fixed it for BTS. Posted here (http://forums.civfanatics.com/showthread.php?t=252243)