Gregg,
I am sure others will chime in and fill in any gaps I may leave, but since I just rebuilt my leaking right fork (again) last night...
Unless you totally take down the fork, there will still be enough residual oil that a volume measure may overfill the fork. Best bet is to use 1-2 oz less, then use a mighty-vac or big syringe with a measured hose to draw out oil down to the listed measurement.
As for filling, just pour the oil in as best you can, with a small funnel, or a thin stream taking your time.
See the chart below for the measurements for oil level, with fork fully compressed.

Mike "Dodis"