Well... they way I understood it was that an image that is 5000 ppi and 72 dpi will print large and pixelated where as one that is 5000 ppi and 300 dpi would print a lot smaller but crisp and detailed and both images would be exactly the same in terms of bytes.  However, I am a nurse, not in the print business so I thank you for your advice. :)

"I am extraordinarily patient, provided I get my own way in the end" - Margaret Thatcher 1989