Ok so I have Ubuntu 10.10, Win XP and Win 7 over 2 systems. On all installations I have Blender 2.55 and on the XP system I have 2.49 and 2.55. The problem is that on all systems and installations Luxrender will not show up in the user preferences tab so I can not activate the script after I have installed it correclty. Secondly the povray option simply works for 00.00:08 seconds and then quits. Yafaray is on all systems as well but it does nothing either. What am I doing wrong?! I would really like to have a raytracing option in blender on at least one of my installations.
The Ubuntu installation is my main choice but if I could get it to work in either windows package I would be cool with that too.