thnx 4 the answer
i thought there would be a trick perhaps.
background was that my profiler 4 example is not in the list.
in the fixture directory i can see a picture which would be fit.
as i don't know how the fixture is namend in lightconverse and i might not know the modelname of other profilers from other vendors that might be in the fixturelist i have to trial and error

or i change the 3d look in the construktor which might not fit in the lens charakteristik