As far as I know, you have to mount the drives manually. Furthermore, you have to go to the terminal to mount.
I created two simple scripts in /home/QtPalmtop/bin/.
One of them is mountusb:
mount /dev/sda1 /usr/mnt.rom/usbstorage
and one of them is unmountusb:
umount /dev/sda1
Now I have two commands I can easily add icons to the tab for easy mount / unmount ing.