Well .rpm is redhat package manager. Used on distributions such as mandrake and Fedora core.
.deb is a debian package used by Debian etc.
As you can see Slackware (from your info) doesn't use either of these packaging methods.
Normally a program will be released in source code as well as binary. This would mean that any Linux distro can install it providing you have the correct compiler and dependencies. It doesn't seem to be the case here, they aren't releasing the source code, only the 2 binaries.
You might be able to look into a way of extracting all the neccesary files from the .rpm.
Or go for K3B
- there's the slackware (10.2) package
i've never used slackware for more than a few days but this - http://www.userlocal.com/articles/slackwaretools.php
- mentions how to install packages in slackware. You will probably need these packages too - FFMpeg, FLAC, Lame, libsamplerate, libsndfile, Musepack, MusicBrainz, Ogg Vorbis, and Taglib according to the website - http://www.linuxpackages.net/pkg_details.php?id=7608
This - http://slackpkg.sourceforge.net/
- has info that might prove useful, i imagine K3B is on the official mirror, i prefer this sort of method because they tend to install dependencies (other programs/libraries required) for you.