Custom Queue Rules

If I wanted to create a custom queue rule with a penaltychange directive in similar to the following:-

[more_members]
penaltychange => 10,+2

How can I enable the more_members rule for a particular queue when using FreePBX? Is there something I can do with the custom files?

Thanks a lot!

If I define the queue completely outside of the free pbx gui, can I do it that way?