Best way is to knock up some headed notepaper for a spurious 'freelance aviation photo-journalist' organisation followed by a web-site of nice pics (remember not to put a counter on the site though), then jump up and down and demand rides in the knowledge that they never check to see what you produce anyway. Seems to work for everyone else.
In the absence of a Smilie for 'tongue firmly in cheek' this will have to do:
