Hello! We have animated models (skinned mesh) now converted successfull into Direct X Format. But the animations in each file are one big animation (for example stand, go, run in a single, big anim). Now we need to devide them in max into the single moves and convert this to x files again to call them in the engine as single actions. How can this be done in Max?

have you trying to delete keys?

just select unnecessary keys an delete them
then select all keys and move first of them to zero position
crop animation to last key
save as... and export
and that's all!

good luck from buck! :)

If your .x file is ASCII, just open it up, and rearrange the keys into the order you want, group them in AnimationSet (ie stand, go, run, etc should be in its own AnimationSet), not too hard to do, can even write a parser to do it automatically if you wish.