tar.gz package unknown??

Trying to install a tar.gz package on my 9.3 with KDE 3.5 I run into problems. Easiest of course is Kpackage manager because that would completely unpack the tar.gz. I may of course gzip the gz and tar the result but I like the kpackage. But when I try to unpack it I get: Unknown package type: /home/cons/HPLX/kio_hplx-0.3.tar.gz And this although kpackage is able to install tar.gz packages. Anybody know of a possibility to force the install?