This works really well. I set up a contact called "PicMail" that's nothing more than
my10digits@pm.sprint.com . Then I email a photo from an old aol address to this contact. It arrives as a clickable link in a text message (that is, like a standard Picture Mail on Sprint phones). When I click it, there's a link to "Forward" it. I click that, and then I type in the recipient's phone number (you don't need to know what service they're on). The photo arrives on a Verizon phone EXACTLY like a standard picture mail, and it says correctly that it's from me so they can reply by text message.