I've talked with the author of ARJ (another compression package like ZIP)
about being able to compress a file and tack it onto the end of an existing
ARJ file. The problem with using PKZIP and ARJ to add new files to an
existing compressed file is that the compressed file can be no larger than
free disk space. When you tell the program to add a new file, an entirely
new compressed file is created of the same size as the original compressed
file, and then the new file is added to that. If everything works ok, the
original file is then deleted. The next version of ARJ is suppose to have
the option of just compressing the file to be added, and tacking it onto
the original compressed file. LAM