If you just want to make an instance (to do whatever in):
Code:
#instance create zone version duration
#instance add instance_id player_name
#zoneinstance instance_id
eg:
Code:
#instance create potimeb 0 7200
Will create an instance of potimeb that lasts 7200 seconds (2 hours)
It will tell you the instance_id that it assigned when the command completes, for this example lets use 31:
Code:
#instance add 31 zerjz
#zoneinstance 31
This assigns the character zerjz to the instance id and zones him in.
Now if you want something you don't have to manually do each time you'll have to look at some scary(not really) scripts.