Denthor's tutorials are over at Gamedev (but in alphabetical order, rather than numeric order). I've also got the originals sitting on my hard disc, no doubt (plus the C++ conversions by Snowman).

You should also be able to get Denthor's stuff from Hornet's Archives, although it may be a pain to find them.

Btw, good stuff Mrwb! Are you planning to make your own demos with this tool at any point?