First of all, the Geneva Conventions (all four of them plus earlier evolutions beginning in 1864) have nothing to do with weapons or means and methods of warfare. They are for the protection of victims of war -- the sick and wounded, POWs and civilians.
The means and methods of warfare are regulated by the various Hague Conventions (begining in 1899) and by the customary law of war (i.e., the "common law" of the international law of war). There is no "law" prohibiting the use of missles on personnel. Oddly enough, there [b]is[/b] a ban on the use of high explosive antipersonnel projectiles weighing [b]less[/b] than 400 grams. So as long as the missles weigh more than a pound we're legal. [:D]
Besides, I doubt that the Taliban regime signed any of the Hague Pacts so it really doesn't matter. These rules only apply when all sides in a conflict agree to them. For more information, check out the Stockholm International Peace Research Institute.
http://[url]http://www.sipri.se/[/url]