Not exactly... I'm looking to make it take on the full texture of the block, but I want to be able to apply my own overlay onto the top face with the normal texture. Essentially if the block were camo'd as a block of iron or something I want it to look like iron on all faces but to be able to add a transparent overlay to the top face.
I haven't yet read the post you linked because I wanted to clarify what I was going for, but I'm going to take a look now and hopefully that helps some with what I'm trying to get working. Thanks!