should i have to use hal

[Farkas Levente]

hi,
i'd like to do the following. i've got a pendrive with a keyfile. when i
plug it in, i'd like to automatically mount (and luskopen) /home/lfarkas
partition which is a luks encrypted partition and it's keyfile on the
the pendrive. when i unplug the pendrive i'd like to umount (and
luksclose) the volume. of course i plug in before i login my system and
unplug after i logout (so gnome and other stuff can't be usable).
can use hal for this purpose of it'd be better simple use udev?
thank you for your help in advance.

-- 
  Levente                               "Si vis pacem para bellum!"