Short answer is YES. Just matter of adding the 2 movie files i.e. AVI, MOV, MPG etc. then have to be re-encoded/re-authored to make a DVD. Nero Vision Express and WINAVI Video Converter do a decent job if you have one of those programs.
How to: Making a DVD with WinAVI Video Converter:
http://www.videohelp.com/forum/viewtopic.php?t=255111VideoHelp site does have lots of guides..but can be overwhelming. If you have further questions, don't hesitate to ask.