resizing an existing primary partition

[Charles]

Hi,
I want to split an exisiting primary partition roughly in half. I have tried 
using 'parted' and have only been successful in resizing the partition in 
question. The newly created free space seems to be inaccessible.
What I am trying to do exactly is resize the /home partition (/dev/sda3) and 
the make a new partition out of the newly created space. I would even be open 
to taking the newly created space and adding it to another existing 
partition... say /usr
Can this be done?

Here is my setup:

Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda8              1035660   1035576         0 100% /
/dev/sda2                77772      9423     64333  13% /boot
/dev/sda3            103210972  10892784  87075376  12% /home
none                     62992         0     62992   0% /dev/shm
/dev/sda7               505605      8782    470719   2% /tmp
/dev/sda5              6190664   2578772   3297424  44% /usr
/dev/sda9              1035660    128556    854496  14% /var

Thanks for any help.