Yes technically they should (I actually did s small script to extract this), but they are a little different from others, since they are on the following format:

DEFINE_MEDIATYPE_GUID( MFVideoFormat_WMV3,      FCC('WMV3') );

#define FCC(ch4) ((((DWORD)(ch4) & 0xFF) << 24) |     \
                  (((DWORD)(ch4) & 0xFF00) << 8) |    \
                  (((DWORD)(ch4) & 0xFF0000) >> 8) |  \
                  (((DWORD)(ch4) & 0xFF000000) >> 24))

Did not dig at the generator yet, but it might need a little bit of modification. Maybe keep this file for the time being and I'll update mappings asap.