Problem in materials when attaching two meshes

[thejoker2016]

Hi all, I created a scene consisting of six meshes each has its own materials, anyways they look like this: http://i.imgur.com/FKgCKW0.png, it's the new adidas world cup ball, anwyays, I would like to attach the 6 panels (meshes) together and their 6 different materials to form one material that would be like a Equirectangular projection of the sphere, the problem is that when I try to attach them all, and apply a UV Map modifier, the textures are messed up:

 Now I need to know: (1) How to merge two objects with their materials merged into one single image, (2) How to do that and make this single material as if it was wrapped on a sphere (Equirectangular projection to be more specific), thanks in advance!