I Used to use bogofilter and procmail

Hello, I have just install clamav and amavisd on my darwin server (6.6). Before this installation my spam filter was bogofilter and some regex with procmail. Did I have to disable this anti-spam ? It seens that now (with the new installation) the mail chain use spamAssassin. Is it right ? In my /etc/postfix/main.cf file there is this line : [code:1:92837b74b9]main.cf:mailbox_commande = /usr/bin/procmail[/code:1:92837b74b9] telling postfix to use procmail to analyse the mail. I'm not sure my post is very clear :-) but if some one had a idea about this "double" spam check, I will be happy to read the answer. Thanks in advance, Jacques