XBae matrix question

[Joost Van de Peer]

Hello,
Currently I'm trying out the Xbae matrix, and there is one thing I would
like to do, but until now I see no way how to do it: is there any
possibility to have a kind of 'tooltips' on my rowlabels and columnlabels,
when I 'fly' over them with the mouse (no click)? Is there some way to get
or simulate a kind of labelEnterCallback and labelLeaveCallback that I could
use then to trigger the generation and destruction of little popup menus?
Thank you!
Joost Van de Peer