gconftool -s /apps/clock/alarm-custom --type string "/home/user/MyDocs/.ringtones/Pain of Salvation - Remedy Lane - 11 - Waking Every God.ogg"
# gconftool --all-entries /apps/clock alarm-time = 1220 alarm-tone = /home/user/MyDocs/.ringtones/Pain of Salvation - Remedy Lane - 11 - Waking Every God.ogg time-format = false default-location = 327 home-location = 386 alarm-custom = /home/user/MyDocs/.ringtones/Pain of Salvation - Remedy Lane - 11 - Waking Every God.ogg alarm-tone1 = /usr/share/sounds/ui-clock_alarm_default.aac alarm-tone2 = /usr/share/sounds/ui-clock_alarm_2.aac alarm-tone3 = /usr/share/sounds/ui-clock_alarm_3.aac auto-sync = false
I imagine you could probably replace the other tones as well: