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  To read a PSX cd and build an image of it use snapshot in a format like this:
  snapshot psx-game.cue psx-game.raw /subcode=auto
  
  To Write a snapshot image file use dao in a format like this:
  dao psx-game.cue
  
  I can always count on this program to copy any PSX game when the others fail. I would say this program is the best if it supported 4 second tracks. Besides the 4 second issue if you have any trouble copy a psx game with this program try changing your read and write speed to 1x (ie: /speed=1) and disable jitter control (ie: /nojc).
  
  Using CDTOOLS along with CDCLIP it is possable to copy 4 second tracks with DAO. Being programs like CDWizard, Prassi, DiskJuggler, PSX Backup and others will copy 4 second tracks with out any complicated work around it is not worth your time using these utilities that come with DAO.

PSX-Backup is a front end:     http://alphaflight.com/psx

PSX-Backup is an easy to use front end that will copy 4-second tracks without having to manually use CDCLIP. PSX-Backup will cut the data in the cue file and mad a pegrap sector for any 4 second tracks it finds. This program does a great job of controlling DAO for you.

Step 1.
After inserting the PSX Game from the menu bar select CD-Recorder, Disk Info and Tools.

Step 2.
Click On the first track (data) displayed this will enable three of the four buttons just below the track menu. Click on the Read Track button and enter the file name e.g. D:\track01.iso and select the Read button.

Step 3.
The program will begin reading and copying the data track file to the selected drive see diagram "D"7.Towards the end of the data track read and copy session (99%) youll receive an error message dont worry this is normal. Click the X to close the Read Error window.

      Follow the same procedure for each of the audio tracks in turn, labelling them e.g.
      D:\track02.wav
      D:\track03.wav etc.

Step 4.
Once you have finished all the tracks click the "OK" button to close the window. Remove original game CD and insert blank CD-R.

Step 5.
From the main title bar select File, then "New" this will open the CD-Type window. Go to Advanced CD-Types and select Mixed-mode CD and check the "Write Data track from a real ISO image on hard disk" box. Starting on the Audio Tracks Tab right click on the START button to open an EXPLORER window. Scroll to locate the drive where you designated the audio tracks to placed. By holding down either the shift or control key select the first audio track then the second,etc and drag all wav files to where it says Drag and Drop Audio Tracks Here making sure they are in the correct order.

Step 6.
Next select the Image File Tab , click on the BROWSE button and locate the "ISO" image file you created. Once selected this will automatically fill in the image file info.

Step 7.
Next select the General Tab the default CD Format should be Session type: CD-ROM XA (Mode2) and click on the Close disk box to select it. Run the test and then record. You should have a backup within 30mins depending on your recording speed.