combining partitions

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I would like to combine the /hd2 and /usr partitions to one /new larger 
partition.

Should I research vinum or should I be reading something else?

I am running FreeBSD 4.6-RELEASE.

My partition layout is:
scsibox# df -h
Filesystem    Size   Used  Avail Capacity  Mounted on
/dev/da0s1a   126M    39M    77M    33%    /
/dev/da1s1e   2.0G   185M   1.7G    10%    /hd2
/dev/da0s1f   252M   4.7M   227M     2%    /tmp
/dev/da0s1g   3.2G   2.9G    58M    98%    /usr
/dev/da0s1e   252M    67M   165M    29%    /var
procfs        4.0K   4.0K     0B   100%    /proc

TIA,
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