Very very new to the program and confused as all heck.
I did find some solutions offered but its regex command and they lost me after the first sentence !
Basically I have around 3,800 files that were previously manually named when the file was created using the format
SURNAME First Name CUSTOMERNO.xxx
To maintain a system wide standard we have adopted a much simpler filekey which is
SURNAME-CUSTOMERNO.xxx
All 3 parts of the old key are variable in length as you can imagine.
Could some kind soul assist with what I need to do to rename all the files (other than do it manually

Cheers for help in advance
Ray