Concatenates two or more source files into a new file, similar to PIP, or appends them to an existing file. Accepts both named directory (DIR) and drive/user (DU) specifications, which allows elaborate operations with files pulled from various drives and user areas. Checks for adequate disk space before doing anything. Version 1.1 adds file date stamping support, new options, and ZCNFG configuration. For ZCPR3 only.