move and resize partitions

[Bob]

When I first installed Ubuntu I did not choose the best partition sizes.  Now I
need to resize them which will require at least moving one partition.  There is
another system installed and dual booted.

I first tried to backup the current partitions.  I got a message "Temp space
has 11960320 available, backup needs approx 68157440."  The temp space seems to
be what is free on /home.  I could not find a way to change where backup
acquires its temp space.

I installed gparted and the "resize/move" menu option is not active.  I assume
this is because I am booted from the partition I want to move.  So I am looking
for suggestions on how to resize and move these partitions.  I have a partition
for / and /home along with a swap.  My preference is to backup everything and
if neccessary do a restore, I do not want to reinstall.

-- 
Robert Blair