how do I change the GPSAltitude() EXIF definition to ellipsoid height when I bring in images with ccmasterkernel?

I am currently importing photos EXIF data into ccmasterkernel and they are coming in as MSL. how do I set them to come in as WGS84 (ellipsoid height) instead. in the GUI, when I add photos there is an option to specify MSL or WGS84. is there something like this in the scripting tools?

thanks for any help.