I.... barely understood that. Be that as it may, download Vachu's BAR Explorer, open the scenarios and/or scenarios2.bar, and extract the files. Then open them in the editor.
Actually, if I recall correctly, you can simply type the names of the scenario files into the address bar of the open menu in the editor. That's supposed to work, but I haven't been exceptionally successful with it for AOM:TT....Um, good luck.
Your Divine Overlord
KING JARED
Aw, hell, I dunno, she had some tig-ole-bitties, d'int she?
big.vitt@gmail.com