/co
Create a normal object using the specified object id (if valid)
In the game
Usage: /createobject <ObjectID> [Optional:Distance]
Creates the specified object in front of you at the distance specified.
If you don't specify a distance then the default value of 10m will be used.
eg /createobject 1655 10\t<- create a ramp 10m in front of you.
What it does
Not explained in detail yet.
Wiki