Hi Lou
The DVD generation part of videopad only writes the project to the disc in a single playable form. It will not add menus, play buttons etc. or add more than one project to the disc.
Using VP the nearest to having multiple projects is to render all your efforts to your PC first and then add them one after the other to a new sequence line with bookmarks between them. (You can also keep "projects" separate using sequences and then adding the sequences (individual projects in effect) together with bookmarks between them. This is abit like cracking an egg with a sledgehammer. The bookmarks will enable you to skip through the DVD from bookmark to bookmark or, as it were, project to project using the skip buttons on your player, but the DVD will still start with the first one. Not really very good. This is what you have apparently done.
The best way is to save your finished projects to your PC as separate avis (or similar) and then use a third party dedicated DVD creator to produce your DVD. This way you can have previews, menus and choice buttons.
If you have Windows movie maker then you will probably also have Windows DVD maker which will do the job.
I prefer DVDStyler which is a free DVD creator program and which gives you full control over nearly all aspects of the creation process. Backgrounds; menus; music and titles.
http://www.dvdstyler.org/en/downloads
However you seem to have had some difficulty in getting this to work.
Another free program is the SoThink DVD maker. This does a similar job but, if you haven't bought the software it places a green advert screen between each film (or at every bookmark if you have used these). It's not particularly annoying though, otherwise it is free to use with no time restriction apparently and the results are good otherwise.
http://www.sothinkme...ovie-dvd-maker/
Worth a try
Nat