Here is the prototype coding for my dungeon maker for that tutuorial. At the moment it only has:
16X16 only
walls
floor
dead floor (ones not created in your dungeon)
saving
There is no media required, and currently no loading or orrigin positioning
For the commands to use it, I suggest you have a go at picking at the code to find how I made it so far. press 1,2 or 3 for whichever type of tile you want, and enter to turn the one you have clicked on to that tile, also press shift to save it.
Hope this is helpful to somebody
RED GENERAL
My computer melts regulary - perhaps it likes being fondue