How to use deception units?

[Kuriltai]

Identify the guy you want to deploy and note the name.
Click on the hex you want to deploy.
Go to the deception dialog and highlight your unit.
You should be able to klik the deploy button unless the hex selected is too far.

Something like that off the top of my head.
Tactically, deploy near bridges and road junctions. Never hurts to have two guys in a key area in case one is discovered early.  I like to get a guy down near Schoberg bridge behind the 106th .