While waiting for Joe to chiime in, I'd like to add a piece of advice:
As long as you're replacing the old receptacles anyway, and unless you're going to throw the main breaker, use a piece of wire to short each circuit at every receptacle; don't assume anything!
On a similar job in a house, we found that the center bedroom's receptacles were being fed by three different circuits! The house was wired "up-n-down"; labeling the panel was an excercise in itself.
Edited for sentence structure. (Yes, it was worse before!)
[This message has been edited by Larry Fine (edited 08-29-2005).]