The hard part may be over, the dangerous part just started. Please do make sure you kill that panel. There shouldn't be any advice pertaining to making sure the breaker is off or how to do it with the panel on. Just save yourself the trouble and dump the power out.
Sarcasm is my friend
I'm here to learn too, i do mostly commercial/industrial/new construction and this place is a great way to pick up tips on residential from some good electrical minds. Excuse the spelling, my phone has a mind of it's own.