Unzip all files of an archive without renaming files:

m_FileAssign -d NEW,CATLG DDARCHIV ${DATA}/PKZIP_ARCH 
m_Pkunzip -a DDARCHIV

Unzip all files of an archive into an output file:

m_FileAssign -d NEW,CATLG DDARCHIV ${DATA}/PKZIP_ARCH 
m_FileAssign -d NEW,CATLG OUTFILE ${DATA}/UNZIPPED.FILE 
m_Pkunzip -a DDARCHIV -o OUTFILE