The original disk of Giana Sisters can be copied with any quickcopy. To remove the protection just run once this basic program:
10 open1,8,0,"1"20 open15,8,1530 print#15,"m-w"chr$(4)chr$(4)chr$(1)chr$(44)40...
This is version 0.51d which includes some bugfixes/minor additions (compared to 0.51c):
Eye of the Beholder: fix for NTSC C64 and C128 incl. turbo mode...