Please help me backup MS Train Simulator
 

I have made a backup copy of Microsoft Train Simulator and the first disk appears to be fine, but the second has read errors (obviously some sort of protection). When I try to install my backup copy i find that the installation is fine, until the second cd is inserted and then it tells me "Authentication Failure". Is there any way of sorting this out. I took the advise of changing the Train.exe file for the cracked on but this does not help as it will not install full stop.
Could anyone let me know if I need to patch the install program, or if there are any sites that may help.

I have tried Clone CD and failed. Some one mentions SD2 but if it was using just SD2 protection, surely it should have an encrypted icd file, which it does not.