Iron sight animation for custom weapon.

[theLeeHarvey]

I am converting a weapon from Fallout 3 (a personal mod) and I need to know how to create an animation so that I can look down the sights in first person aim mode like the vanilla weapons. Failing that, is it possible to take the animation already contained in the vanilla game and add it to my mod? If so how? I'm not looking for a lengthy, complicated answer here (that's not to say I wouldn't appreciate it), more just a point in the right direction where I can find the info I need. Thanks in advance.