Did you try Infinity Tab Pro (which is free)? Sounds kinda similar to what you are looking. It does No. of sites, custom columns, custom pictures, and custom b

Did you try Infinity Tab Pro (which is free)? Sounds kinda similar to what you are looking. It does No. of sites, custom columns, custom pictures, and custom backgrounds. It really gives you a lot of control compared to all the other extensions I tried.