Simple File Joiner combines many different files into a new file. If you've downloaded parts of a larger file that were split into separate pieces when posted to a news server or you have a large collection of MPEG movies split into different sections, you can rejoin them with Simple File Joiner.
Simple File Joiner works on text files, some movie files (like mpg movies that are all the same size and encoded the same, but not with avi files), and others. if the files you are trying to join together each have header information that pertains to that particular file, SFJ will not work. This includes GIF, BMP, JPG, AVI, DOC, etc.
Often, when you see a file set with the extensions .001, .002, .003, etc. they will join correctly with SFJ. Be sure to test the newly joined file before deleting the old source files.