GTA San Andreas securom protection

[goshav]

i have GTA San Andreas DVD, and i've been trying to make a backup copy of it but something doesn't seem to work right. if i copy a files onto dvd the driver is looking for the original(authentic) dvd.
If i run Alcohol 120 and make virtual drive of the game, than hide the drive-it works.
how do i copy the contents of the dvd withou it asking me for a right disk?

[Copytrooper]

You must create an image with Alcohol incl. DPM data (i.e. SecuROM v4.x/v5.x profile), then write the image to DVD with RMPS option enabled, and play with RMPS emulation enabled.

[goshav]

i created .mdf + .mds files . Alcohol 120 was refered to the image .mdf, after which i copied to the dvd drive with RMPS anabled, but it asked for the original dvd