Well, their website seems to mention it'll work on Fedora 6.

That seems strange to me as Fedora is now at (11?) and is
usually (don't quote me) "backwards-compatible".

But anyway, you may want to try downloading the rpm file and
then using 'alien' via the command-line to convert it to a .deb file.

alien, is not typically installed by default, so you may want
to first check to see if you have it. At a terminal, you can type
which alien

and if it spits nothing back at you, then you don't have it in your system
and you can use synaptic GUI or the command-line installer
sudo apt-get install alien

Once you do have alien...

How to use it?
http://taufanlubis.wordpress.com/2008/01/22/alien-%E2%80%93-convert-rpm-to-deb-o\
r-deb-to-rpm/

Convert from RPM to DEB (alien -d)

sudo alien -d your-rpm-fileName