correct me if i'm wrong here but...
isn't he asking HOW to do it? or asking if he did
anthing wrong?
fromhell, means that if you mix & match the lower.md3 with the upper.md3 from the different character models. You cant use the animation.cfg from either character. As there now going to be wrong.
And if you don't modify the animation.cfg to suit, you may get weird results.
Most people only mix & match the heads.