I would like to put the tokyo metro maps on my ipod. I know there is an app in the store, but it has pretty poor reviews and access to the maps is free anyway! I know I can just use a picture file, but is it possible to use a pdf instead? I can view them in safari but can't figure out how to download them, but they work much better than even the high resolution pics. On a side note, I am obviously very much new to this and do not want to jailbreak my ipod... at least not yet. Does that mean that only app store apps will work or can I source them from elsewhere and still use them? Obviously my music and videos come from a wide variety of sources, but not sure if apps would work or not. Thanks!