create installation DVD on IA

[Juan M Leon]

Hello, I am looking for some advise on Itanium.
we have a script that creates the bootable image from /var/tmp/image directory.

The script uses the following commands:
make_medialif
mkisofs
instl_combine
and finally executes the growisofs command.

I have a IA image under /var/tmp/image/archives. everything seems to run ok. However when I tried to reallocate the script to /usr/local/ directory. The new iso file is smaller on size than the one created on /var/tmp. my question is how can I force to use other directory than /var/tmp/image to read the source archive file.

Thank you for your suggestions.

Juan