Like most arranger owners I became anal about collecting styles and also PDF form of lead sheets. I use several different keyboard setups for gigs - Dans vArranger, a Korg PA4X, a Ketron SD7, and my Tyros 4. With each setup I use a different way of using and finding my song setups. on the Korg I use the songbook, on the SD7 I use registrations, on the T4 I use only songstyles grouped by various gig requirements and also in Alpha order. Dans vArranger allows me to associate the correct lead sheet with the style and displays it on the laptop screen when the songstyle is selected. I don't really have a favorite method - they all work great with each keyboard.
Deane