You can put the Zip files into a directory named airdrums. 
Run SETUP from Windows program or file manager.
The setup program will only update with the latest files, also
no INI, config.sys, autoexec.bat or any system files are changed.  
When you first run Airdrums, The Midi In Out screen allows you to
choose the Midi In Out device.  For first time users just select 
OK.  When the drum set appears, click on any drum with your 
mouse.  If you hear a drum sound, then the settings are correct.  
If you do not hear any sound, choose the Midi In Out selection 
from the menu and change the Midi In device, select OK and click 
on a drum.  If still no sound, click the right mouse button on a 
drum and try a different octave.  The combinations of these 
settings should enable drum sounds.  Remember, Airdrums will play
any MIDI sound and any external device, just experiment with it 
and make some noise.