Copy the unziped files to your DD2 directory and run install.bat !
Don't  forget to  backup your "savegame" file before installation, 
becuse this program overwrites it and you loose your previus saved 
games and replays ! Good luck !

If you have problems, mail me at:
isebpecs@mail.matav.hu
           or
Doczi Tamas
Pecs
Postavolgyi u. 35/c
H-7632
Hungary

And visit my Destruction Derby 2 page at:
http://www.geocities.com/MotorCity/8925/derby2.htm