xfce-mount panel plugin question

I was wondering if anyone has considered the implementing something in the
xfce-mount panel plugin that would allow the user to specify a command to
use for mounting and also for unmounting?  The reason I ask is that I use
ivman to automount removeable media, but in order to unmount it the pumount
command is needed from pmount, umount doesn't work.  So I figured it would
make things easier if this was an option for the plugin so people don't need
the command line to unmount removable media.

-Tom Moyer