ok, i ve found it. For those of u who might be interested, it is very useful
You need the Greasemonkey addon installed first.
(https://addons.mozilla.org/en-US/firefox/addon/greasemonke...)
(http://cadmus.cnwr.com/~mjfork/bb-gm/show_player_cap_valu...)
It adds player cap value and skillsum to your roster.