Somehow, I managed to answer this question, but on the wrong thread.
Must remember to get proper amount of sleep.
I'll post it here now, and tidy up the other thread...(kobo deluxe guestion)
p7zip is in the repositories. You will need to have the testing branch enabled. I've heard mixed reports on the p7zip in the repository, depending on what it is being used for.
You can install this from connie.slackware.com...http://connie.slackware.com/~alien/slackbuilds/p7zip/pkg/12.1/p7zip-4.57-i486-1alien.tgz
If you want to build it your self you can download the sourcefiles at sourceforge.net.
If you watch this tutorial you can see the steps to building p7zip. Just skip to the part after unetbootin is first downloaded.http://www.opensourcebistro.com/Tutorial/VL60/01.Installation/bootusb/unetbootin.htm