* Get a GUID:
lcGUID = SomeCodeToGetAGUID( )

* New temp folder is OS temp folder + the GUID:
lcTempFolder = ADDBS( GETENV( "Temp" ) ) + lcGUID

* Create the new folder:
MD ( lcTempFolder )

* Build a CONFIG.FPW file in the lcTempFolder, that includes
* TMPFILES set to the new lcTempFolder folder
TEXT TO ...
blah
blah
ENDTEXT

* Finally, use ShellExecute( ) or even RUN to start the WC instance with the -C command line option
* specifying the CONFIG.FPW file you created above

* To ease operational maintenance, you could even delete the temp folder and its contents
* from the launcher, after its WC instance has terminated