Thought this would be a good thing to share with everyone, we end up using it alot for our gameserver customers wanting custom content. This program generates a lua file which has addfile function for all the files in the same directory as the program. One thing, do NOT use this on the root of your gameserver it will make your players download a load of stuff they wont need.
Program is also quite customisable for other purposes, if you open the parameters.txt file it is in this format:
extensions to search for
Prefix of each line
Suffix of each line
The lua file it outputs is a unqiue name (does it off the date and time) so it wont clash with other files.