1.  The easiest way to play a zdaemon demo is to select both the demo file and the wad
    file using ctrl+click and drag them to zdaemon.exe.




2.  If you are used to using command line to play demos zdaemon works the same way except
    the parameter is -netplay instead of -playdemo and you add the file extention .zdo
    instead of no file extension.

    -netplay demoname.zdo -file wadfile.wad

    Remember that zdaemon supports long file names so usnig the commandline will require
    more typing than dos ports or doom2.exe.




3.  The stupidest way to play a demo is to run zdaemon from the command 

    -file wadname.wad 

    without the demoname and then use the console command NETPLAY [demoname]