Ah, I stumbled across AutoIT last night, looks like that might have to be the route I try.
I had the AVG admin console but that was the first thing that went when setting up the new admin console. I've gone to CA Threat Manager, who do have a competitor removal tool I can distribute with Threat manager's msi but it doesn't work on anything above avg 7.5. (Although their tech guys are having a look at 8.5 to see if they can do anything for me now).
Cheers for the help!