The patch files in the attached tarball modify MPV 1.5.3 to use CIGI V3_2 messaging. Note, this patch does not add the new V3_2 functionality to MPV, but it does allow MPV to communicate with a CIGI V3_2 host.
CIGI V3_2 changes for MPV 1.5.3
CIGI V3_2 changes for MPV 1.5.3