Change C:Users\Public\... to \\DAVE\My Documents\...?

I want to copy a file from a Vista computer to a similar directory on an XP computer. For example:

FROM: C:\Users\Public_zProgramFiles\EDX\EDX.S
TO: \DAVE\My Documents_zProgramFiles\EDX\EDX.S

If I have file EDX.S selected, how can I create my target filename?
I somehow need to replace:

 [b]C:\Users\Public[/b]\...

with
\DAVE\My Documents...

Is that possible in Opus9? Or do I have to branch out to a VBScript to do it?

Some kind of script or batch would be needed.

It's similar to these two recent threads:

[ul][li]search and replace in variables
[/li]
[li]Is there a way to cut paths like this in a command?[/li][/ul]