restoring single directory from full backup

Hi, 

i made a complete backup of my virtual server using duplicity. i read the 
man page but didn't really understand, how i can restore a single directory 
from the full backup, if thats possible at all. 

if i use the syntax how i understood it, duplicity starts to restore the 
full backup to that path but not the single directory... 

any hints ? 

Command Line for full backup: 

duplicity --exclude /proc --exclude /tmp --exclude /mnt --exclude /dev / 
scp://xxx <at> yyy.de/mybackup 

restore deleted test directory:
duplicity scp://xxx <at> yyy.de/mybackup /root/backuptest 

thanks,
till