Op. Flashpoint Gold Update?

[mb75]

I've got a problem with backing up my Operation Flashpoint and Gold Update cd:s... Or is it possible to do that?

I have made copy´s of both cd:s. The Op Flashpoint cd installs fine(using the serial from the original Op Flash manual), but when I try to install the "Gold Update" I get a message saying 'Insert the correct CD-ROM, select OK and restart application'.

Do I need some sort of crack or what should I do?

Thanks