Have you tried reading books on breastfeeding? At any decent-sized bookstore there'll be a dozen or so and, if it's one of the chain stores (Borders, Barnes&Noble), they'll let you sit in the store and read them in comfort, so you can be sure the book you're buying actually has the information you need.

If there is one in your area, check out the local LaLecheLeague (if not, I'm guessing they have a website). They have literature to help adoptive mothers induce lactation. You don't need to tell them why you need the information, but just in case you might make up a story.

There is no magic injection; it requires ten or fifteen minutes of nipple exercises several times a day for a couple of weeks or more, and it doesn't always work. If you've put in your time and not gotten any result, a VERY understanding OB/GYN can prescribe an oxytocin nasal spray that you can try for another week or so (continuing the nipple exercises), but if you have no luck after that, you're probably out of luck. (Prolactin makes the milk, oxytocin makes the milk available.)

There are at least two other Forumites who know more about this than I do, Pooka and e.e.norcod. Maybe they'll show up to give advice. Good luck.