most of the usb memory sticks/keys/etc are recognized as scsi-drives I think...so when you plug it in, it should be something like /dev/sda1 or /dev/sda4 or such. see if you get something like that in /dev when plugging it in...after that simply mount it with the mount command, or if you want to use it more easily, create a new fstab entry for it (edit /etc/fstab):
/dev/sdaX /mnt/mountpoint vfat user,noauto 0 0
where X is a number, depending on what the device file is called (try sda1 first..), and /mnt/mountpoint is the place where you want it to be mounted (where you can access it)
after this, save fstab, and then simply
Code:
mount /mnt/mountpoint
where /mnt/mountpoint is the mount point you wrote in fstab, and the device ought to be ready for use. unmount with
Code:
umount /mnt/mountpoint