To reconstruct the zip file, concat these all together using your OS facilities. On unix systems you can use the "cp" command, or "cat". To use "cat", execute cat file1 file2 file3 ... filen > file.zip On WindowsNT/95 systems you need to use the "copy" command. Something like: copy file1 + file2 + file3 + file4 ... filen file.zip Should do the trick. For reference, I've included the source for the program I used to split the files. Mark