hi..whenever i try to install m-h-d i got this

Nokia-N900:~# dpkg -i /home/user/MyDocs/modified-hildon-desktop_3.3_armel.deb
(Reading database ... 65803 files and directories currently installed.)
Unpacking modified-hildon-desktop (from .../modified-hildon-desktop_3.3_armel.deb) ...
dpkg: error processing /home/user/MyDocs/modified-hildon-desktop_3.3_armel.deb (--install):
trying to overwrite `/usr/share/gconf/schemas/hildon-desktop-keys.schemas', which is also in package hildon-desktop
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Errors were encountered while processing:
/home/user/MyDocs/modified-hildon-desktop_3.3_armel.deb
Nokia-N900:~#

plzzz help