Typically I put all my templates in subfolders under one top level folder named "templates" and this automatically gives me the tabs.
A simple test would be to quickly rename one of the template folders to something like "template1" and see if it shows up in the dialog box.
the path in your system options is the first tab in the new window... all subfolders of that setting will show up as seperate tabs with the name of each folder so David's setup is what I have used in cases like this
Ok, sorry, I didn't do my homework very well before I posted the last response.
I ran a quick test on our setup and I also find that if the end folder has the same name as another one, it will not show up even though it has a different path. So I guess I have to agree in that it seems to be a current limitation.
I have run into this before, and as Wayne stated, the end folder name needs to be unique.
if you have...
...then you are only going to see 1 tab, called "Templates".
The solution, as suggested, is to create a unique name for each of these end folders.