And what do I need to do to keep the current name and just add at the end like "Rebe"l / "Phone" etc
I don't have it installed on the computer I'm on right now, so I can give you more details tomorrow, but it was something to the effect of:
1) choose the folder/files to work on
2) in the list of renaming options, choose to insert text at beginning/end
3) type in your text to add, and tell it where to add it
4) optional, see a preview of the new file name(s)
5) click run and it just goes. Finishes in seconds, too