umm. Mhlx, I don't think you can edit someone else's pictures if you don't have their express permission to do so, especially if you're trying to make a profit off of it, whether it's digital or real life.
It's called copyright infringement. It's as if I stole one of your pictures and put a few words on it and tried to re-sell it to customers, wouldn't you be pissed off?
Also, just because you know someone did this and didn't get in trouble, it just means they didn't get caught by someone in authority. There is really no excuse for art theft, whether or not you get caught.
I'm *censored*uming you're too young to know the difference, but if the original artist of those pieces found out that you were using them for your own profit, they could pursue legal action against you in real life. It's pretty serious and I dont' want you to take it lightly. Please don't try and sell things that you didn't create yourself.
I'd like you to remove those pictures, I'm looking for the original artists/photographers right now and if you don't remove them, I will contact them about this. :x