Snakes are used anytime you want to move multiple channels of audio from one place to another. If you want to connect to your church mixer, you probably want to get a DI box, connect your keyboard to it and then plug in the coresponding channes into the mixer at the other end. If you have an amp, most DI boxes have a link which passes the sound so you can use an amp and run through the house at the same time.
If you're trying to record, you're going to have to patch that into your mixer.
Hey Thanx for replying!!! Did you ever get a chance to listen to what I have posted??? I'm taking some of them down soon but putting up a new mix of Behold the Lamb. Check your PM. Need some advice on my set up.