Can you help to identify these frames, bikes or parts?

I think its a Elite Piste (as the original poster suggested). The Alu team were, to my knowledge, road frames. The welds on the frame is the picture seem a bit less smooth than they often were but it could just be the color/livery and illumination drawing them out.
The fork? The standard fork delivered with the Elite Piste was a carbon fork. The (spectacular) track MAX fork was an (expensive) option.
These, I think, were really the last great Merckx track frames (especially with the MAX fork which is one of my heafy favorites)..

Here is a picture I found of Marcel Barth riding one (with the above livery):

(carbon and not steel fork)

I've just checked mine - it says Alu Team on it, and came direct from Merckx with the Max forks. Mine is a sort of blue/green colour that de Wilde used to ride.

I think that the Elite Piste was the next generation - the model that Keisse rode some years ago.