I didn't manage to use the shared variable "thinggie" - as I don't have the shared package and since I didn't find it on the ActiveState repository...
Instead I used a file in which I'm writing a byte (0 for inactive 1 for active)( I know you're thinking it's way too slow but it works fine anyhow...)

However when the new thread starts up, it blocks the main program and I can't do anything else.
I know someone already posted a node about this but I can't seem to find it anymore (bad luck :~/ )
If you've any idea, let me know, and thanks again for your help...