I do mostly high energy praise and worship, those who are up on it would know stuff like CFN, Israel Houghton, Hillsongs, CHris RIce, etc.
I use a Yamaha DGX-500 for grand piano sounds and as a controller, MIDI'd to a PA1x-Pro. I use full keyboard chord scanning with the full accompaniment with some guitar stuff down or muted, since I have a live guitar player.There is one song, "Dancing Generation" where the original intro uses a bass guitar solo to kick the song off so I start with the manual bass button and play the bass part live with drums, just like the recording. Otherwise, everything is "as is".
I have, however, discovered a website,
www.interactiveworshiplive.com that features popular worship songs that are basically all the tracks, minus lead vocal (drums, bass, guitars, B3, brass, soprano, alto, tenor, etc.) that you can download and run using Ableton Live software. The tracks are .wav files and you can mute whatever tracks you want to. YOu can then set differnt points in the song to trigger from an external MIDI controller or from the computer keybard, so you're not stuck with the preset song as is. You can repeat a verse, chorus, bridge, etc. as many times and any time you wish. Kind of a cool alternative for worship leaders.
I'm currently building my own "Super Music Computer" from scratch that will run this stuff, Cakewalk, software synths, etc and basically have my own recording studio in a portable tower. So far, I have the tower (with built-in handle), a 2.66 Gh dual-core processor and motherboard plus 1g of ram. I'm getting ready to get another G of ram, then going to have 2 HD, and a 15" touchscreen monitor. Should be sweet.
Jeff