[Squall-Leonhart]

Hi, you are European no?
your disks are likely PAL then, so you need to Rip them to the HDD using a tool like Alcohol, or CloneCD, into a format which supports subchannel data, such as CCD, MDF or NRG.

Then you can mount them on a virtual drive, select the virtual drive in the CDR Sapu 1.3 properties and run them like a normal disk.

When you need to change disk, just go to File > Chane disk, mount the next Disk image on the virtual drive then click ok to continue.

 

[Squall-Leonhart]

Alcohol and Daemon Tools both allow you to enable a Virtual Drive, the Help files with these tell you how to do it

Alcohol needs to be set to th PSX ripping profile to include subchannel data.

ISO is ISO, MDF is not iso, MDF and CCD files contain more data then ISO does.

 

[Squall-Leonhart]

Daemon Tools (if thats the tool you mean)
should install a right click menu, so when you right click on an mdf or mds file it will allow you to mount it to the virtual drive.

 

[Squall-Leonhart]

thats because you didn't select the Virtau drives, letter in the CDR plugin

 

[Squall-Leonhart]

then the problem is most likely the image does not contain the subchannel data the disk requires to bypass the copy protection.

 

[Squall-Leonhart]

Farzon has told you what needs to be done, if thats not working, then the image is incomplete.