Yes.
akSpeaker.EquipItem(Clothes)
However many "clothes" you need, each an "armor" property.
Caveat: unless your actor is a teammate, the next time they're loaded, they'll revert to their default outfit.
You could try setting their outfit:
akSpeaker.SetOutfit(Outfit)
where "outfit" is an outfit property.
If you want to make an actor function like a manequinn, have a look at these:
http://skyrim.nexusmods.com/mods/25429
http://skyrim.nexusmods.com/mods/23798 [only main file]
They're my work; they both deal with making an NPC wear what they're given. Simply extract the script and script sources to your scripts folder and have a look.