Image editing/create animated gif

I have some images where i need parts transparent and i need the shadows extracted to a seperate layer. 1) with [login to view URL] i need the image part transparent. (keep in mind the shadows which fall over the image). 2) [login to view URL] i need the billboard to be transparent (keep the logo and the painter) and i need the shadow of the painter and the shadows of the 'cloth'' at the bottom in a seperate layer. 3) I need an animated gif which repeats without notice and does something like this: [login to view URL] But then in only in white (so a white flag waving). That's it for now. Maybe more work in the future.