There is a way to send picture messages to others. It's kind of a hassle and stupid that it has to be done this way but it can be done.
Basically email a picture to yourself as an attachment (add an imap account or something to your ppc). Email it to
yournumber@pm.sprint.com (example
8182223333@pm.sprint.com). You will get a text message saying you got new picture mail. View the picture mail (it will pull up in internet explorer), then forward it to the phone number of the person you want to send it to. Since this way does not use the address book you will have to actually know the phone number (or copy/paste it from your address book). Yes this is a hassle but it is a temporary solution.
Note this will be considered data usage on your phone along with a txt message that you will get from the link.