Simply edit /usr/sbin/osso-usb-mass-storage-enable.sh and remove these two lines: insmod /root/psfreedom.ko exit 1 Then save the file and reboot the device.
Honestly, I've never really done any maemo development. I could probably make a script, but I'd have no idea where to start with the icon/widget. Also, Kakaroto said on his blog that someone is working on a UI: