The problem with WMP is that it only creates data discs. You made a copy of the disc but most standalone DVD players won't play a data disc.
You should have Windows Movie Maker in Start\Programs. I'm getting a crash course right now on how to use it because I usually use Nero for these kinds of things. I don't have time to look up all the details on using WMM so this is quick and dirty.
Open it and select video.
Open Window Explorer and browse to the drive the original disc is in. Open the Video_TS folder. Drag and drop all the VTS.....Vob files into WMM and add all the files to the storyboard in the correct order. Make any edits using what's available under Edit. Then, under Publish to, select DVD. It will send you to Windows DVD Maker
In DVD Maker, just click on next and, then burn.
I couldn't find a way to to import the entire contents of the disc into WMM so I guess you'll have to use the default menu, if you want one.