Adam, my first thoughts would be to set up a platform or some type of system utilizing a ladder where you can place your hive body very close to the hive. You will need your smoker a great deal (likely) on this removal as you will not be using a bee vac.
Give them a few puffs to run them away from the comb sections you are trying to remove. If they don't cooperate with a few puffs you may have to be more aggressive with your smoker. The idea is to smoke them until they begin moving away. Pay close attention however to their movements when you apply smoke as you don't want to overdo it.
When they begin moving allow them time to move then put the smoker down.
As stated begin with the brood comb sections if possible. At some point you should begin to see the colony orienting to the new set up. Caging the queen and placing her onto one of your frames will facilitate the process.
Try to finish the removal at least an hour before dark to allow them ample time to orient to the new set up. Of course you will want to seal and move the hive after dark.
Here's one I did without a bee vac: http://www.jpthebeeman.com/jpthebeeman/itemdisplay.asp?itemID=3694&retID=3571&nextID=3699