Go to a site that will allow you to design posters online, such as Big Huge Labs.
Click on "Choose File" and select the main photo of the poster. Choose the "Style" of the photo. The choices are light, dark and neutral. Select the "Primary Text Color" and the "Title Font."
Write your "Movie Title" and "Tagline 1" and "Tagline 2."
Write the "Acting Credits," "Production Credits," and select the movie "Rating." Choose the "Release Date" and the font color and click "Create." You will see a sample of the poster. If it's satisfactory, click on "Add to Cart." If not, go back to "Edit."
Click on "Checkout" or "Checkout with Paypal," and enter your appropriate payment details. As of 2010, these posters cost $9.95 plus a $4.95 shipping and handling charge per poster.