I use shortcuts to load sparse settings files, depending what type of media I'm listing too.
http://download.rockbox.org/daily/manual/rockbox-sansaclipzip/rockbox-buildch5.html#x8-1010005.14/.rockbox/shortcuts.txt[shortcut]
name: Music Mode
type: file
data: /.rockbox/configs/music.cfg
[shortcut]
name: Spoken Mode
type: file
data: /.rockbox/configs/spoken.cfg
/.rockbox/configs/music.cfgstart directory: /music/
shuffle: on
repeat: off
cuesheet support: off
start in screen: wps
replaygain type: track shuffle
skip length: track
autocreate bookmarks: off
autoupdate bookmarks: off
autoload bookmarks: off
use most-recent-bookmarks: off
crossfade: shuffle
/.rockbox/configs/spoken.cfgstart directory: /spoken/
shuffle: off
repeat: all
cuesheet support: on
start in screen: bookmarks
replaygain type: track
skip length: 20s
autocreate bookmarks: recent only - on
autoupdate bookmarks: on
autoload bookmarks: on
use most-recent-bookmarks: on
crossfade: off