Final box model

As I attempted this on Sunday but failed I wanted to finish it. I spent quite a bit of time just researching different methods of doing what I wanted to accomplish. I found a video that showed me the technique I'd have to use, I was very happy that I may finally be able to do what I want to. Then I found out that this feature was taken out (to my knowledge) when Photoshop went into the CC version. I did all the steps up until then but decided that the product wasn't to the quality level that I'd want so scraped it. As I wanted to export this model into dimension but couldn't, I wanted to see what actual preset objects dimension included. What I then thought of was that with random parts I could assemble a model that could be textured nicely. Even though this isn't the method that I wanted to use, it works well enough to be viable. (The textures on the items in the pictures are not the final textures but instead used to clearly distinguish the items from each other.)