If you are looking for video levels, check in HKLM->Software->Cyberlink->PowerDVD and any subkeys for any values named COLORSPACE and change them from 3 to 1. There is one in the HDDVD key. I have not tried a Blu-ray disc yet, there may be one there too. It will fix crushed black issue and also PowerDVD changing the colorspace and messing up other media apps on your PC (I had the problem with TheaterTek).
However I do not know in detail what your issue is so this may or may not help.
This message was edited 2 times. Last update was at Jan 12. 2008 05:52