As far as I can tell, IFDB links to “tadownload-d.html” for Glulx files. (But not for TADS.) So that BL page could probably be simplified to just Glulx.
IFDB links to “tadownload-c.html” for Z-code and AGT.
I could come up with a brief guide, if you can tell me how to get it to you. (And whether the format matters much.)