Changing partition sizes

I currently have the following partitions:

[farli@tesla farli]$ df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/hda1              1718336    246440   1384608  15% /
/dev/hdb1                 5823      1085      4438  20% /boot
/dev/hda6              1154808    128120    968024  12% /home
/dev/hdb3              1898964   1327036    475464  74% /usr 

I am soon going to upgrade from Mandrake 7.2 to 8.0. Is there an easy way
to expand the /usr partition at the expense of either the root partition
or the home partition?

Before you ask, no, there are no other drives, hard, CD-RW, or tape,
available to back up the /usr partition to.
--
Jim

Bliss comes from within, ignorance from without