Make sure you have all the foomatic and ijsgimpprint pkgs on your system (foomatic-db-gimp-print and dependencies). I have a z43 which I had a hard time getting going with kanotix and newer knoppix though knoppix 3.3 installed fine. The only driver for my z43 that's working for me is just the z43 foomatic/gimp-print-ijs, the "recommended" driver which is z42/43 didn't work.