I've been slacking on the tutorial, but here is a run down to build a few tiles.
Print and cut out your tiles.
Cut the Walls away from the tiles
Glue the walls to some foamcore with a Glue Stick, I use the Elmer's Xtreme Gluesticks.
Cut the Walls out
Glue the Walls and the Tiles to more Foamcore
And finally, cut out the finished tiles! All Done!
What's cool about these tiles, is you can easily do Fog of War, take a look as Nyan Nyan (Soda Pop Miniatures) explores these tiles.
Hope that helps guys!