I did these a while back, using the Pen tool in Photoshop CS2. Enjoy, and feel free to comment!
My first try: Aud R8.
Finished Picture:
http://i127.photobucket.com/albums/p158/parkfarm_mob/Finished.jpg
Work in Progress pics.
http://i127.photobucket.com/albums/p158/parkfarm_mob/original.jpg
http://i127.photobucket.com/albums/p158/parkfarm_mob/WIP-1.jpg
http://i127.photobucket.com/albums/p158/parkfarm_mob/WIP-2.jpg
http://i127.photobucket.com/albums/p158/parkfarm_mob/WIP-3.jpg
http://i127.photobucket.com/albums/p158/parkfarm_mob/WIP-4.jpg
http://i127.photobucket.com/albums/p158/parkfarm_mob/WIP-5.jpg
http://i127.photobucket.com/albums/p158/parkfarm_mob/WIP-6.jpg