Graham Mowi7 the same way as in the link in your first post and the one in this post
You can also use html post and get forms
http://syntax.xtgem.com/manual/xtgem/default?func=get_variables
The include files have the same name as the value in the variables just in different folders
The values can also be read by xtscript
http://syntax.xtgem.com/manual/basics/default?func=get