Hi there! If you would like to customize a model you may use your favourite 3D and 2D program. I use SketchUp for editing the mesh and The Gimp to adapt the texture. I am not used to Meta, and Blender is far beyond me. I mostly revise the unfolded pattern since it is easier for me to work with Gimp instead of applying a new texture on the model. You have to choose your own favourites; Meta, Photoshop or PaintShop may do it as well. Good luck with your model; but remember to clean up the mesh first to avoid intersections.