PClinuxOS iz rpm based (Mandriva), I doubt very much klik will work with it. On the other hand, PCLOS has its own repository, full of redy-to-use programs.

UPDATE: http://klik.atekon.de/docs/?page=How%20to%20use

Supported distributions

* Kanotix BH 8 and newer http://www.kanotix.net/
* Knoppix 3.7 2004-12-08, 3.8 CEBIT and newer http://www.knoppix.de/
* Ubuntu 5.10 "Breezy Badger" Live CD (Beta) http://www.ubuntu.com/
* Linspire Five-0 http://www.linspire.com/
* Kanotix CPX-MINI http://debian.tu-bs.de/project/cpx-mini/index.html
* debian sarge, sid (some cmg files might fail to run)
* OpenSUSE 10 (currently in preparation, some cmg files might fail to run)
* Fedora Core 4 (currently in preparation, some cmg files might fail to run)