will 7zip work for the bb files??
you mean opening the raws?
anything that can open a Zip file or a Rar file is fine.
I use WinRAR
7zip can unpack many file types, including the ones used here (.rar/.zip).
However~ if you want to pack files, 7zip can pack them into a zip file. However, you should probably not pack them into it's type which is 7z, because other people might not to be able to.
But for just unpacking files 7zip will be fine!