Oh, archmage. You should have pointed to the Glest Guide instead, as that is some REAL old stuff. Of course, I just edited that old post to point to the glest guide now, so don't worry about it.
For up-to-date help with modding, and to learn the XMLs, check out the glest guide at glest.110mb.com
Be sure to bookmark the page for future reference!
*I'm not sure though how this topic is needed. There is a lot of mods that all have their own resources, and most players who would need this list will never see it, and most players who will see it won't need it...*
