Add text to all file names in folder

[cure4glass]

I have 3 folders (vol 1,2 and 3). some of the folders have the same file name("contents" for example).
I need to copy all of these files into one folder but with some having identical file names that creates a problem.I'm hoping someone can help me out.I'd like to be able to drill down to a folder,select it and then simply add text ahead of the file name.example, I could select Vol 1 folder and insert the text "Vol1" into each file name ,then the file "contents" in the vol 1 folder would become "vol1contents",etc.
Does this make sense?
Thanks in advance!!
Greg