UPDATE:

Ok I have over ridden the DoDraw procedure for my TArrow object.

It draws with transparency, but does not animated like usual.

Hoping for sheer luck, I added "Inherited DoDraw;", and it drew the static alpha transparent image, and then the normal *animated* one overtop lol.

Got any advice on how I can fix this up? There's probably some manual code to go into the DoDraw procedure I would assume.