Advanced Trails

Hi, I was wondering if their was a way to make trails rotate images. For example, could I
make 2,3,4 and so on vtf images transition with each other. I understand how to make basic,
one image trails in vtf-edit, however I was looking to see if this was possible.

                     Thanks!

Make an animated texture that cycles between the 4.
Or have 4 trails with different textures and mess with alpha to transition.