The files are all packaged with PKZIP and are in EBCDIC so you download from here,
unzip, upload as Binary (No EBCDIC to ASCII translation) to
your mainframe to an FB80 data set. Sequential files
are suffixed .DATA and are ready to use after being uploaded (again as Binary). PDS
data sets are suffixed .XMI and are in XMIT format so you will need to do a TSO command
RECEIVE INDATASET(???) where ??? is the file you upload to transform it back to usable
PDS. You will need a utility to unzip (decompress) the .ZIP files and I suggest
either PKZIP or WinZip.