Ok, just tested this. Application exists when I press the button! So, doesnt really work. Behaves kinda like "require" if I reacall correctly... Seems all works fine until the Mainloop thingy...

Update: Apparently it DOES work.. Even only with do ("script.pl")!! Fonky. Reason for the exit is that I had exit after the Mainloop statement (dont ask my why). Seems though that somehow the gui pops up nicely without the Mainloop... (But still only one Mainloop is in the works apparently!)
However, now I got a small "problem" with functions beeing redefined when I press the button again.