Status Removal (burning and knocked down): Burning and knocked-down statuses will be removed from party members (burning statuses also from Self) if an appropriate skill is available.
Object script king, hehe ;-)
Since enemies can throw grenades, a script should be able to do it:
--> Burning can also be removed with water balloons, not only skills ... (I might be wrong, never got deeply into object scripting ;-)
It might require a combination of ObjScr *and* Osiris because it might not be possible to query inventory content from object scripts (don't remember this), which of course would break 'retro-active mod applicability'.