How do i put AI marines in a level???

[Offspring]

i downloaded AI Marines or i guess u could call them "actor varients"(im not sure) a while ago and i still cannot figure out how to put them in a level... is there a special program i need??? or can i not put them in a level at all???...plz help that would be awsome..thx

EDIT:

yeah, umm, feedback would be cool. im sure any tips would help too thx.