That's a great idea.
Perhaps ingame commands like /setresolution [ min| 1 | 2 | 3 | max ] perhaps, where 1/2/3 are settings you can set and save similar to spellsets, only for display options/particles/dynamic lighting/models/etc?
EverQuest Shamans, Paladins, Druids, etc.
http://www.shamanscrucible.com/forum/
http://www.shamanscrucible.com/forum/viewtopic.php?f=15&t=959