Try updating from 2.2 to 2.3beta
http://www.dovedove.it/hfs/hfs232.exe. This will allow you to use other templates available correctly and i believe it has a more advanced "archive method" (a.k.a folder as 1 file). Secondly templates are written in XHTML, CSS and JAVA (default is only XHTML), and so it uses smart coding to minimize image/design downloading by the users from the server (resulting in less bandwidth wasted in page loading), so it cannot be edited in such programs as u've mentioned.
PS. When I mentioned XHTML, JAVA and CSS I didn't want to imply those were your only options, but the currently used ones in templates available.