Best Way to Image a Protected CD?

[LaBBa]

well it's a data CD it's an application and i don't see any loader it's build in the exe so it's not packed or somthing like that ..

this application comes with 2 CDs :
CD1- is installation. (no protection)
CD2- data CD of all DataBase of application - protected

in the protected CD there are 3 files with a XXX extension in root:
file00.xxx - 563,438 KB
file08.xxx - 850 KB
file09.xxx - 3KB

there is 2 more folders

MA folder files:
file08.MA - 1,054 KB
file09.MA - 36 KB

YZ folder files:
file08.yz - 361KB
file09.yz - 11KB


from what i have saw when i try to crack this when i'm running with an image of the CD i get an error from the application that this is not the original CD . it check first to see if there is a debugger present and then it check a black list of virtual dirves to see if it run from a virtual CD after that it try to load the CD ...
I have patch the CD check with error message "not original CD" so it will continue to load from the image CD but application crashes when it try to run.

I don't understand (yet) why it fails to run from image.
I guess there is a signed key in the CD and it try to read and decrypt with that key the files from the CD so i need to digg deeper.
I just don't understand why i can't copy in the CD image the signature like the code of the original CD does ..

I have maked all possible images with Alcohol 120% at speed x1 and still it fails.

Regards,
LaBBa