Well, theres a helluva lot of polygons in six to eight millenium figures so I reckon your PC is going to complain a bit! Then you add a couple of halfway decent textures and maybe some hair and your going to be crawling! Try just using a high polygon 'Mil' figure as your main character and maybe try some of the 'low res' figures available to fill out your scene.Try checking out some of the tutorials here on setting up 'multi figure' scenes. Hope this helps a bit.