actually for stun you can use the stun0 and stun1 settings or holyshits. you place the id of the spell you want to stun with there.
[mq2melee]
stun0=12345
stun1=54321
those 2 stuns will fire innately.
I personally prefer to use macro for stunning because it lets me have a lot more control of when and how to stun.