I just found a website for rigging your model automatictly
http://www.mixamo.com/c/google/05162011_autorigging_soldier?utm_source=google%2B&utm_medium=cpc&utm_content=autorigging%2B%2B468%2BX%2B60%2Bb&utm_campaign=autorigging%2Bdisplay%2B&gclid=CKW0tuXo5q8CFQVoKgodVSQO3w (http://www.mixamo.com/c/google/05162011_autorigging_soldier?utm_source=google%2B&utm_medium=cpc&utm_content=autorigging%2B%2B468%2BX%2B60%2Bb&utm_campaign=autorigging%2Bdisplay%2B&gclid=CKW0tuXo5q8CFQVoKgodVSQO3w)
And a website for founding some model ^^
http://thefree3dmodels.com/stuff (http://thefree3dmodels.com/stuff)
:af2: