clamav-0.97.1-i486-1dj.txz is the binary package, clamav-0.97.1.tar.gz is the source package.
You do not have to unpack clamav-0.97.1.tar.gz. Do not use any clamav.SlackBuild from slackbuilds.org
Just read the next.
Well, to make things simpler and clear. If you have salix-13.1 just download http://people.salixos.org/djemos/clamav ... 86-1dj.txz
and as root type in a xterm. upgradepkg --reinstall --install-new clamav-0.97.1-i486-1dj.txz
If you have salix-13.37 then download everything from http://people.salixos.org/djemos/clamav/0.97.1/
cd to download directory and run fakeroot slkbuild -X
After that a new clamav-0.97.1-i486-1dj.txz will be created.
Then run as root upgradepkg --reinstall --install-new clamav-0.97.1-i486-1dj.txz
To upgrade viruses just type as root freshclam
in a xterm
After this you are ready to use clamav and check for viruses.