Never mind - Missed that these were award tix.

Your itinerary will be refared to whatever it costs on the date of the change for: ROC-PHX-HNL-ROC. You will then receive a credit for what you hold now. When you use the credit to purchase the reroute, you will most likely pay $200.

I say, most likely because that is the standard change fee for domestic changes on non-changeable tickets. You will need to check the specific conditions of the fare(s) you purchased in order to confirm this.

Thus, you will owe or have a credit (depending on the cost of the refare):

NEW COST = NEW TICKET - OLD TICKET + $200