Those aren't animated...
Yes, they are. They are 3d models, full animated but you can use them only if you set 3d options by server side, not replace like you do (frm). I only remind you of this project, you can find everything about 3d for 2238 in fodev.
Yes that's truth,i was reading about this long time ago,as i saw the basic model were maded but you still needed to make animations ,but totaly easier then overeplacing all the frames...
Also 3d as i saw on 2238 did many lagz when you met perhaps 3d Deathclaws and 3d Desert stalkers,if everything would be 3d i guess it wouldn't be so stable...