I ordered and downloaded a movie that came in two parts. I could play each part on the computer. However, when I burned these parts to DVD I could not get to the second part to play.
So, how can I join these two parts into one larger movie and then burn that to a DVD?
I don't want to use the Windows 7 Movie Maker as it doesn't have the proper codecs to play the movie on a general DVD player. Already tried that.William Lockie

"I ordered and downloaded a movie that came in two parts" Ordered & downloaded from where? Sound suspicious to me.
Ordered from "Answers in Genesis". Have done this before and played on computer with no problem. Now want to burn to DVD for other players. William Lockie
