ZanZan is by Edmundo Bordeu ZDoomGL 0.66.2 is by MichaŽl Ryssen ZanZan TC Pack put together by Cyb
The ZanZan TC was missing from the /idgames archive, which I felt was something of a crime (why it was never uploaded I don't know) since it's such a great TC. For more info on the TC read the file ZanReadme.txt in the zip.
This pack includes ZDoomGL 0.66 because that's the version of ZDoomGL needed to run the TC since it has MD2 support. The current version of ZDoomGL (coded by timmie) is more stable, but supports less features. You can actually play this TC with that version (but you need to move the player1 start in map01) but it will look silly without the MD2s.
To play this just simply unzip to your Doom directory WITH folders (it will unzip to a folder called 'zanpack') enabled. Now, the archive includes a few batch files for Voodoo 2 and 3. If you have one of those you can try using them, but your best bet is to just run zan.wad from the command line, and ZDoomGL will do the rest. Read ZanReadme.txt first though, as it will tell you the options you'll need enabled to play the TC properly.
If you have any questions about running the TC the feel free to contact me.