partman recipe questions

[Tim Jackson]

I have several questions about using recipes with partman during the 
Ubuntu install.  This is using the current Breezy Install

1. Is there a way to tell partman to use existing partitions? This would 
be similar to the way a RedHat kickstart can use the onpart keyword.
2. When I create a partman recipe that  includes  tmp and var using the 
following recipe .  I end up with two unnamed partitions.  In other 
words it creates the partitions but does not create the mount points.  
Whats up with that?

d-i partman-auto/disk   string /dev/discs/disc0/disc
d-i partman-auto/expert_recipe  string 
boot-root-usr-home-opt-var-tmp-recovery :: 150 150 150 ext3 $primary{ } 
$bootable{ } method{ format } format{ } use_filesystem{ } filesystem{ 
ext3 } mountpoint{ /boot } . 2000 2000 2000 ext3 $primary{ } method{ 
format } format{ } use_filesystem{ } filesystem{ ext3 } mountpoint{ /} . 
2000 2000 2000 linux-swap $primary{ } method{ swap } format{ } . 4000 
4000 4000 ext3 method{ format } format{ } use_filesystem{ } filesystem{ 
ext3 } mountpoint{ /usr } . 4000 4000 4000 ext3 method{ format } format{ 
} use_filesystem{ } filesystem{ ext3 } mountpoint{ /home } . 16000 16000 
16000 ext3 method{ format } format{ } use_filesystem{ } filesystem{ ext3 
} mountpoint{ /opt } . 2000 2000 2000 method{ format } format{ } 
use_filesystem{ } filesystem{ ext3 } mountpoint{ /var } . 2000 2000 2000 
method{ format } format{ } use_filesystem{ } filesystem{ ext3 } 
mountpoint{ /tmp } . 500 1000 1000000 ext3 method{ format } format{ } 
use_filesystem{ } filesystem{ ext3 } mountpoint{ /recovery } .
d-i partman/confirm_write_new_label     boolean true
d-i partman/choose_partition    select Finish partitioning and write 
changes to disk
d-i partman/confirm     boolean true

3. If try to create a partman recipe that doesn't use the whole disk it 
fails saying I haven't created a  / partition.  How does one only  leave 
empty space on a disk using a partman recipe.

Thanks in advance for your help
Tim J