The steps are usually like:
-Find out if your distro has a package-management-system. For example, Red Hat, Debian and Genoo have, Slackware doesn't if I remember right. If there is a package management syste, find the package for your distro. If that's not the case, or you want to try it elseway:
-Find a tarball. Google for it, or go to Linux.org and click in the left column on applications, and search for it.
-Download a tarball, in your case something like SneMUL-<<version>>.tar.gz,
-cd to the directory where you downloaded it in a shell:
$ cd /home/my_download_dir, where mydownloaddir is your dir,
$ tar -xvzf SneMUL-<<version>>.tar.gz
$ cd SneMUL-<<version>>
Now, become root, using
$ su -
(Or in any other way you like)
$ make install
Now you should be done!