Your brokerage (since you said you are a Realtor) should have feeds into Trulia. For future Trulia related question, best submit it under Using Trulia.
If you wish to have your listing displayed on another agents website, simply contact the other agent and ask them if they would like to display details of your listing on their site. They will be able to get all the photos and hoem details from the MLS listing.
If I have misunderstood the question, please let me know.