Other Great! Websites:
Hot Air Gun
(paint stripper)
Blog: (Link)
Other heat sources:
Heat lamp (Link)
Oven
Microwave (careful!)
Hot Air Gun (Movie) (Here)
Hair Dryer (Slideshow)
HotAir and Clamps (Link)
Hot Air and Spatula (Link)
Iron and Spatula (Link)
Heat the wall/floor from the top, and from the bottom.
Keep the Hot Air Gun moving all the time, about 2" away from the surface, and put your hand on the surface often to make sure it isn't too hot to touch but is too hot to leave your hand there.