append object animation ModelFile$,AnimFile$,ObjectNumber,StartingFrame
ModelFile$=The original model file
AnimFile$=The animation data
ObjectNumber=The number of the object you want to animate
StartingFrame=The frame you want to start your anim at.
To append more than one animations to a model, you use the starting frame variable. For example your walking frame starts at frame 1 and is 12 frames long. Thus it ends at frame 12. Then you can append your next animation to start at frame 13 (Altho in this case, most ppl would start the second anim at frame 20) and end depending on how many frames it is.
Then to play the anim use
play object ObjectNumber, StartingFrame, EndingFrame
Whatever I did I didn't do it!