Yes you are right, the tute is for 1 avi to 1 dvdr, however, its easy to use it for multiple movies per dvdr. I assume the avis are 30min long (size in mb is almost irrelavant) so I would attempt to put 6 on a dvdr with menu.
Follow the Tute but in the Bitrate Tab, set the CD Size to 1/6 (thats for 6 eps per dvd) of the 4440 size. Thats 740. Then encode each separately to its own folder (I would use batch mode here - read the avi to vcd/svcd tutes on how to set that up) Then author in DVDLab or TMPGEnc DVD Author adding an appropriate menu. Compile, test play and then burn. I do this all the time so I know it works.