DOS batch file

[screwloose]

It has been way too long since I have worked with DOS batch files, however, I want to rename a directory if found to something else.

The directory name to begin with has a space in it, such as, "market research" that needs to become "market_research" and how to search in multiple directories for this subdirectory if you are at root.

This is so simple for me in Unix, but no longer with a batch file in DOS or Windows.

Thanks.