thanks ockham, actually i thought i had seen another one...but i have been working with bvh mixer. it seems great at replacing animation parts, but does not seem to average the values, just replace them (unless i get really crazy with the input values, then the figure goes crazy also) is it designed to add the two values in the frame? for instance, i set a left shoulder bend at 30 degrees, every frame keyed the same, export the bvh, then use mixer to (add?) the two together...nothing happens even when i set rot scale to one which should apply the bvh full force. (not adding?) so i try average....have the arm at bend 10, every frame keyed, import the 30 degree bvh, and it just replaces, again even with the stregnth set to one. doh! never mind i figured it out...setting it to 1 actually replaces the file...setting it to .5 averages the two...so how could you add the values together, like 30 bend +30 bend should be 60 bend? ok actually i think i see a problem that you can't use two indentical numbers, no matter what you type, + or -, 2 or .5 or 1, nothing happens. so it does average these values right? is there a way to make it simply add to the values? sorry for all the troubles, thanks a lot for you help