ok, thanks a lot for all your input guys, spend the last 2 days with testing different approaches to clean this horribly noisy DVD (Money Train PAL)
What can I say... Deen helped, in fact it looked better than with STMedian Filter, however it seems to me that there's less overall noise but more mosquito noise with Deen...
I also stopped using aSharp and lowering the resolution to 480x576, but I still don't like the quality of my final MPEG. You know I guess there are movies around which are so "dirty" mastered, that you can't compress them properly at all without getting horrible artifacts...
however thanks a lot. Any further ideas are greatly appreciated!