I want to make new animations for soldiers, just how would I do that?

If anyone has an idea, link, or can quickly guide me that would be great.

if you want to munge a new animationset (mix anims)
click me! (and leave the scalig part out)

if you want to know how to make vcompletely new animations
click me! but you need the full version of xsi 5.x to export them