When you say InterVideo, are you refering to WinDVD Creator?
If you finaly have the Video_TS folder created, use this Guide to burn it to disc using ImgBurn.
InterVideo was pre-installed when I bought my Toshiba Qosmio laptop. I believe that it is now called WinDVD - however I still use it as InterVideo. I can import an avi file into it. Put this on the timeline. Maybe edit it, or add menus, captions, fade, etc., or do no edits at all. Then it outputs everything directly to a dvd-r during which it creates the \Video_TS folder, vob files, etc., i.e. it creates a fully playable dvd. It has none of the messing around of ingBurn. BUT I can't transfer my copy of InterVideo from my laptop to my netbook since I don't have the installation disks 'cos it was pre-installed on the former.