Step 1: Choose a program Ты wanna work with (photoshop is definitely the best and maybe Ты can download it somewhere *cough* but of course Ты shouldn't do that, because that's illegal*cough*) Ты can however download the program GIMP for free at various sites. 2: Fanpop banner size is 800px x 100px. If Ты have a picture that's bigger than that, Ты can cut the part of it that should be the banner out. или Ты create a new white picture with the size 800 x 100 and then Переместить one или еще Обои on it. 3:Play around with whatever color settings the program Ты chose has and see what happens ;)
While I agree that photoshop is the best (I Любовь it), if all Ты want to do is screw with colors, which may или may not be the case, Microsoft Office Picture Manager (which probably came with your computer if Ты have a PC) is much easier to use and Ты can do a lot of sweet stuff with it. I started out using it, and while Ты can't add text или combine pictures, the work that Ты can do with color is amazing. I've made some of my Избранное Иконки that way.
But if you're looking to do anything other than working with color, I agree that Photoshop is definitely the way to go.