Variables allowed within <string> are:
%h Current hit points %H Max hit points
%m Current mana %M Max mana
%v Current movement %V Max movement
%e % of hit points %f % of mana
%g % of movement %P Level Progress (25.33%)
%x Current experience %X Experience to next level
%t System time %T Game time (8 AM)
%a Current age %A Current hours
%n Phase of the moon %I Indoor/Outdoor
%W Wilderness/Civilized %p Position
%d Drunk/Tipsy/Sober