.VOBs are standard DVD files. To change their status from Read Only, right-click the file in Windows Explorer and select Properties, then remove the checkmark from the Read Only box and click OK. You don't need the other 2 files, but leave them in the folder until you're finished with the VOB.
There are several programs available for converting DVD VOBs to AVI, which can then be edited in any video editor, including Windows Movie Maker. The one I use is called
Handbrake (freeware).