Making wounded units

How can I make a wounded unit? Permanet flesh corpses dissapere after some time, any ideas?

My suggestion would be to play with the animations of a living unit: Try showing its decay animation and setting animation speed to 0% before it actually decays.

there is a corpse delay trigger somewhere...ill post it when i get home

You could create a special effect that makes a unit bleed

add special effect trigger:
Event: unit life is * percent
Action: add special effect *