[crossfire] unaggressive monsters

[Preston Crow]

I'm trying to create some monsters that aren't aggressive until they see 
combat near them.  I've taken a regular monster and added 'unaggressive 
1' which makes them stand there as expected, but they don't notice 
fights around them, only when they are attacked.

What do I do to make them more trigger happy, but content to stand still 
and chat most of the time?