two postfix instances

How can I share a single content filter between 2 postfix instances???

The contrent filter I am refering to is amavisd-new.

I'm also noticing I am unable to use locathost in both instances as
it fails to start citing:

May 30 01:24:26 dellc postfix-secondary/master[21289]: fatal: bind
127.0.0.1 port 25: Address already in use

It also seems that I cannot define amavisd-new in both so I was
wondering how to achieve this.

Because smtp-amavis is defined in the first postfix instance, can I
call it from the second without defining it or defining in the second
postfix instance will allow me to use it:

/etc/postfixalt/main.cf:
content_filter=smtp-amavis:[127.0.0.1]:10024

Please don't reference any man page stuff unless you are going to
send me your computer so I can see what you're talking about.

My OS vendor screws with the man pages so I don't have what you do so
please be specific and detailed when you respond.

-- Dale