I understand that the WMA Pro 10 codec is installed with WMP 11 (on XP). Which dll (or dlls) contains the WMA Pro 10 functionality? Which dll contains the WMA 9.2 lossless functionality? Which dll contains the WMA 9.2 functionality? What tool is used to display the above information? (e.g. "WMP Pro 10" etc..) For WMA Pro 10 with 5.1 surround, which settings for the encoding do most find optimum (i.e. a person with good ears hearing effectively no difference to a 5.1 PCM uncompressed wav) ?