To copy a file from the publication directory to a temporary location:
CopyFile( SYSTEM_PUBLICATION_DIR + "\\test.txt", SYSTEM_TEMP_DIR )
To copy a file from the publication directory to a location contained in a variable SaveDir, renaming it in the process and confirming any overwrite:
CopyFile( SYSTEM_PUBLICATION_DIR + "\\test2_copy.txt", SaveDir + "\\test2.txt, true )