Xvid& Auxiliary frames

Hello,

I am fairly new to video compression and MPEG-4, so pardon my simple ques=
tions.

I am evaluating multiple codecs for use in a project that requires use of=
 three
auxiliary 8-bit greyscale images in addition to yuv and alpha for coding
arbitrary-shaped objects.  As I understand it, this requires the MPEG-4 M=
ain
profile support.  I did not see any indication in xvid.h that XviD suppor=
tes
the the Main or Core profiles.  Is that true and if so, do you plan on
implementing these profiles in the future?  Thanks in advance for clarify=
ing!

-- John