Trying to get hotkey cmd-esc

I’m really trying to get my old hot-key ‘cmd-esc’ working. I use this on another computer. I can’t set it in total terminal config because it says that it’s a system wide hotkey. However, I don’t think it is. That used to be front-row’s hotkey, but that’s not there anymore. I found the plist file, and tried setting the hotkey there, however, TotalTerminal appears to rewrite the plist with it’s hotkey settings whenever it opens & closes.

How can I set this hotkey?

(OS X 10.9)