Feeding live is really no different than feeding frozen/thawed prey. Just no thawing involved!

You need to pre-scent the room for 20-30 minutes, and keep the room dark. Just leave the secured mice in the room so the snakes know what is going to happen.

After 30 minutes or so have passed, open a tub, drop the mouse in on the opposite side of the snake(do not remove anything from the cage, the snake is very capable of catching the mouse on its own), and close the tub/cage. Continue down the line until everyone has a mouse, and then sit quietly across the room and wait. It helps if the room is dark for shy eaters. You can leave the mice for 10-20 minutes in the cage with the snake. If, by that time, any haven't eaten, just remove the mouse until the same time next week when you feed.

That's how I feed and everyone has been eating throughout the winter(except for Amani, but she's queen.. ).

Hope that helps. And don't worry about feeding live, snakes haven't evolved this long just to be outsmarted by a mouse. Just be sure to do it safely so they are expecting a feed.