How to play Diablo 2 not-perfect copy?

[Tytbyts]

Hi! I have a not-perfect copy of Diablo 2, but cannot make it run. It installs onto my system without any trouble (thru 'setup disc'), but when I insert the 'play disc', I get a message saying 'Make sure play disc is inserted, then try again'!

I do not know what type of lock Diablo 2 has. Is there anything I can download (what and from where) that'll make these very same discs run? Remember, the problem seems to lie only with the 'play disc'.

Please help me, I'll be very grateful!! I'm a novice in all this.

Thanks!!