So, I've finally got around to playing with Nova Launcher and UCCW and am looking to create my own graphics (Icons, Backgrounds) on my PC instead of using other custom packs. I want to make each screen on my phone based off of my favorite musical albums. How large should my graphics be (making them in gimp) and what format should they be in to transfer to my phone? If anybody can help with the technical specifics of this It would be really really appreciated! Thank you in advance!