Working Swapmethod for the newer models of Sony Playstation!
(tried & tested!)

Double Swap
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1. Put in the original
2. Boot your machine
3. The white 'Sony-Screen' will display
4. The disk is going to accelerate to 2x speed. When its finnished
   with accelerating, change disks (there's still the white screen)
5. If you did it at the right time, the black PS-Screen will display
6. Now your copy is going to stop and then its going to accelerate
   again. After a few seconds the disk will slow down and stop again.
   Put in your original now.
7. Now the disk will accelerate again (there's still the PS-Screen).
   Now you can hear that the PS is reading the Passcode and Toc again.
8. after it read the toc (0.5-1 sec) you put in your original again. 
9. the game will boot and it works