Is there a way to extract the names of the folders (paths) used to check out files from projects?
CA Harvest SCM all versions and platforms
The hco and hrefresh log files, if kept, can provide the best source of this information.
The other places you might look are:
More information about the hco command can be found in the Command Line Reference Guide.
More information about the hrefresh command can be found by reading the chapter on "Synchronizing Reference Directories" in the SCM Administrator Guide.