right click your PR shortcut and go to properties
In the Target section, add a space and then "+fullscreen 0" (if it's already there and set to 1, just set it to 0)
To switch back to full screen, just set it to 1 instead of 0
*credit to Jaymz(I just copied his post)
Best line yet...
Me: "Hey APC, Can I get a ride to squad 6?"
Unknown: "This APC ain't no Taxi!"