usbmount and user permissions

[AG <computing.account@googlemail.com>]

Hi all

I've recently installed usbmount on Squeeze in order to mount a usb 
floppy disk drive to read old floppies.  However, usbmount has now taken 
over everytime I mount something using usb and only allows me - as user 
- to copy from the usb device, not write to it or delete it, and has to 
be unmounted using sudo umount /media/usb0

My question is: how do I change this so that I can write and umount the 
usb device as user? So far, I have tried: chown, chgrp and chmod all 
with no effect. User is also added to all the groups that seem 
relevant.  Research on-line only refers to the chmod, chgrp and chown 
options as well.

Any further ideas on how to change this please?

Thanks
AG