You might get a better response if you re-post to the Cake Q&A;. There are many talented folks out there who should have suggestions for you. If you are looking for piping techniques, vs design transfers, if you have The Cake Bible, check out her section on cake decorating. For suggestions on transferring designs check out the Show & Tell Forum School Bus Cake thread http://www.realbakingwithrose.com/index_ee.php/forums/viewthread/443/P15/ (I don’t know how to paste a link). The second page talks about design transfer techniques.
Best of luck,