IndexFiles(dir,ext,string)
Creates a space delimited string array of filenames, minus the extensions, in a given directory
dir - A subdirectory of the levels directory, for example, IndexFiles(webgifs,ext) would get you to the webgifs folder
ext - the file extention to list
string - the string to write the list to
examples:
IndexFiles(midis,mid,client.midi);
would list all of the midi files in the graal2001/levels/midis folder, and write them to the client.midi string
