I am pretty sure i can answer both of your questions.
Terry, I'm not sure if what you want to do is better than just having that driver running. The way i would do it would have the macro constenly searching for that program. I envison bad things happening then.
as for the Toggle key. This is simple. In MacroExpress you'll create a new macro and set a Hot-key, like Win+F2.
I indcluded the code you can take a look at but basically i did this.
If Program not running "program.exe" Run macro "startprogram"
If program running "program.exe" Run Macro "stopprogram"
Simple eh?
<IFOTH:14:1:EXPLORER.EXE><MACRUN2:Runprogram><ENDIF><IFOTH:06:1:EXPLORER.EXE><MACRUN2:StopProgram><ENDIF>