apply a patch in Freebsd

[Caio Figueiredo Abecia]

I have the Freebsd 6.2 version.
I got a problem installing from my DVD ROM drive, and I found a patch in 
http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/111084 .
I wonder if I could try this patch to solve my problem.
What may I do to get a FreeBSD with this patch working?
I need get the source package ? What more?

Could someone please give me some help?

Thanks Caio