it`s depend on creating a shortcuts in phone FileSystem.

in each schortcut is information about oryginal location of file.
to fully change menu style you need to upload 25 shortcuts, but you do it only once

so in fact you can store menu and icons in phone memory or memory card and easy change it from your computer using f.e. data cable or BT, or eaven included phone file menager.

its hard to explain in english :/