Slider to object morph

Hi newby in a way in, my question is I want to use 3 sliders for a user to scale the x,y and z of an 3ds vbx file object. Ive got the sliders working ie movement and count. I have my object, its a fish by the way, it the fish is imported, and has a 950 frame animation which morphes through all the conceivable scales in all dimensions combined and alone. Now I want to set the slider to goto the frame relevant to the size n scale of the sliders point. Example the x slider is at 1 so the fish would be flat x wise at the point of the animation. So the user can select the type of fish she/he wants.

Am at a loss on how to go about this, not wanting the programming but more an idea really, and is it possible, am sure it is, they say anything is possible.

thanks for your help, (pre-emptive gratitude)

Peter