e usb you can try this:
Grab the vboxusers group id:
<code>
grep vbox /etc/group
vboxusers:x:124:ionstorm
</code>
Edit the fstab with the group id # in bold:
<code>
sudo gedit /etc/fstab
</code>
A... group in fstab file:
none /proc/bus/usb usbfs devgid=124,devmode=664 0 0
</code>
Now lets edit the mountkernfs.sh file with the gid in bold:
<code>
sudo gedit /etc/init.d/mountkernf