Pls Help: Postfix Multiple Virtual Domain Setup

I am using Mandrake Linux 9.2 server with the standard included version of postfix installed which is better then sendmail i was previously using.

Ballically i have 25+ domains on my extreemly old FreeBSD 4.x server. I bought a new box and got a clean version of linux on it. I set up Apache etc. but i am having problems with postfix.

Orignaly i wanted to use a mysql backend, however this means i need to recompile the postfix tar (which is something i dont want to do.)

Basically i want to set up all these virtual domains and 100 or so virtual users using these email accounts but i am lost.

In the master.cf it says you can include references to external files (i am guessing like sendmail) although it seems vauge on the format of these files.

Any help on how to refence these files, and what they should look like would be appreciated. Also if someone could post a similair master.cf file it would be great.

Ty in adv.