Ok, I know this gonna sound kinda weird but i need to extract certain scenes from cartoons say, er...TheSimpsons..and turn them into animated GIFs. Which is fairly do able...using a JPEG capturing tool and turning the frames into GIFs...with PSP Animation shop...

However, my dilemma is the not in capturing the scenes but capturing a particular moving character,say Bart riding his skateboard...but without the background...in other words making everything else, except Bart riding his skateboard transparent...and turning it into a GIF...

I have fairly good idea of cutting (or enclosing Bart and skateboard) and colorizing everthing else (w/c is easier said than done coz it kinda messes up the animation)...but have not found any "easy" editing tool to go about doing this...any ideas? recommended tools?