Do you need a better drawing program? GIMP is a free open source paint application that compares nicely to Photoshop but without the price tag.
GIMP has everything you will ever need from a paint program already built in and plenty of tutorials to show you how to use them. However, if you ever need anything custom, you are likely find that someone has already made a plug-in for it. From animation to batch processing and painting, GIMP is a powerful tool and well worth a try.
GIMP is available for Windows, Mac and lynux
Sources: http://www.gimp.org/ - http://members.ozemail.com.au/~hodsond/dbp.html - http://code.google.com/p/gps-gimp-paint-studio/