Yep, the only two file/folder combinations that the game currently looks for are 'test' and 'AutoSave', so all you have to do for it to recognize it is to rename the backed up file and folder.
The default number of turns that the game autosaves should be 12...so every January, it saves the game. You can change how many turns it autosaves in the Prefs.ini file. We will be adding a place on the save/load dialog when it's in, or on the options menu, for you to edit it there. I think that I reduced mine to save every 6 turns, so that it still saves in January.