You need the original demo installed before adding these files.
http://discuss.futuremark.com/forum/showflat.pl?Cat=&Board=gaminggeneral&Number=3505745
This demo comes with the April issue of PC Gamer.
http://discuss.futuremark.com/forum/showflat.pl?Cat=&Board=gaminggeneral&Number=3505745
This demo comes with the April issue of PC Gamer.