How to do new sare update?

[Steve Lake]

	Ok, I'm going to take a huge guess that just dumping the new sare file 
into your rules directory (in my case, since I'm on freebsd, it's 
"/usr/local/share/spamassassin") doesn't work and you need to do some kind 
of update thingy.

        Someone got a guide on how to do this on freebsd?  Many thanks.