ok, yes, I see that there is some confusion, probably mostly on my part, but here is what I do.
-I have a folder with 24 4k textures.
-I drag 1/24 textures in to UE.
-UE then shows me one texture file in my content browser, and when I double click that texture, it shows me this:
Which led me to believe that I now had a VT texture with all my 24 textures in it(40,960x12,288), that I can apply to my model (which has 24 udim slots)
But by looking at the image, it is clear that, the image at least, only contains the texture from that 1 image that I dragged and dropped in to UE, and applying it to my model just creates a mess.