Provided that the "mother" PC and all others run the same version of Ubuntu (e.g. Gnome Ubuntu 8.10 32-bit), the simplest method is just to copy /var/cache/apt/archives (exc lock file) from the mother PC to others.
Then try again.
If the CD/DVD does not contain all dependencies, it won't work. This may be because you didn't select all dependencies when writing the DVD, or because you are starting with different default installations.
Any CD with necessary .debs can be added as a source:
https://help.ubuntu.com/community/Re...20Repositories