How do I create a parent for an item in zmodeler?

[DominatorC 44]

I am mapping out a vehicle lighting system and I need to parent my Extra 3 & 4 but don't know how? Pic explains all

[propel 86]

I think what you want are called dummies. Go to upper right hand corner and you'll see a upside down cone, click the arrow, click dummy helper, press the icon that shows up. Should also be mentioned that dummies are not just to sort stuff, they are visible on the workspace (the blue boxes). In GTA IV dummies are used in some instances to tell the game where to position some of the parts (i.e the wheels use dummies to position them, that's why sometimes they get screwed up in game). The position of the dummies don't matter here though.

[DominatorC 44]

Cone? Also I guess I can't just copy the other dummies and rename them. I'm getting a fatal error immediate crash once truck is spawned. http://prntscr.com/98tvft