How to add parts together.

I have 3 parts of the movie notorious on the divx format. I have no idea how to put them together. I have winrar and everything. Im stuck Plz help me plz
Answer #1
Open part1 winth Winrar and let it extract the file. After that you will have the movie.
Answer #2
what extension have they got? Go to folder options and enable show extentions. If its .rar then use either winrar or winzip, if its .001, .002, etc use HJsplit