Bartender can be modified to WOW TBC Gold meet the parameters you specify, I believe. However, the person who suggested another addon is the best bet. There might be a way for you to search for the keybind.dll file under the WoW search engine and copy and paste it to the desktop or something. Then , you can drag them into and out from the file to edit them.
Security of the client's data and interest in the world is the biggest issue for me. Of course, the 3.X client is way superior, the engine is more polished and tools are easier to use. However, I'm feeling like I have lost the vanilla part of cheap Burning Crusade Classic Gold changing between 2.X to 3.X.X. I do not intend to publish WOTLK content. Also, I'm not sure who would be interested in playing on 2.4.3 servers. 2.4.3 server.