Well Photoshop is usually the best program you can use for this kind of things unnie and as for tutorials try this site:http://lemonswirls.visualchic.net/tutorials/ they've got these 2 tutorials that are basic in making posters but are really helpful~ For further and more complicated thing you just have to try your luck and search around in Google and Livejournal~ There are lots of tutorials out there ^^ I hope that I helped you even a little bit~