Alien

alien is a command line command that allows you to install an RPM package or just convert the RPM package into a deb file.

First, Use Synaptic to install alien.

To install an rpm package, open a console and type as root:

alien -i packagename.rpm

To convert an rpm package to a deb package, open a console and type as root:

alien --to-deb packagename.rpm

and then install the .deb file with KPackage or dpkg

For details, open Konqueror and type:

man:/alien