BTW - just had a hunt through for you and heres some crowd piccys.

http://www.poserdirect.com/freebies/crowds.zip

Sample image below

No sporting types of crowd, I don't cover those events, but at least you can use these legally.

Plus you may need to resize these hires images for use in poser. You'll also need to draw around the people, and edit out the knights, but theres 4 images so you'll be able to create a couple of rows at least. Also includes a set of romans as well :)  

Pinky - you left the lens cap of your mind on again.