Ingridients for the unlimited Clusterball playing like in full Real
arcade's game :

1 - get Clusterball 1.100 Demo (unlimited playtime, one map) and install
2 - get Clusterball 1.007 Demo (limited playtime, standart maps) and install
3 - copy \Levels\ folder from C1.007D  into  C1.100D  \Levels\ folder 
    (do not overwrite newer files!)
3 - launch  C1.100D  and select any level from the full game!
4 - you can uninstall  C1.007D  after this, because you already got all it's features!

For future use I recomend just to leave  C1.100D  and \Levels\ folder from  
C1.007D without "Egypt.mp3" and "Egypt.mrg", than installing this will 
become almost as easy as installing original game.