yeah, I figured this out the other day...
To link a pawn to a path node you have to first add a pawn, then a path node.
Go to the pawn's properties then click{AI}
Scroll down to patrol route, then click add
select the node area within what it just made, then select the node and click 'use'
This will make your bot walk around in your level, so you could use these to make a droid round the corner and start shooting at you.
Any way, I figured this would help, so EVERYONE can know how....
I'll write a comprehensive tutorial later and make a map to go with it.
hehe :D just show 'em the tut on und.