Disc read error eh? You know i have seen so many complaints about this and people have gone to great costly lengths to get it fixed, and you know what i did? Wiped the laser with a piece of cotton wool. Crazy isnt it? The hardest bit is opening your PS2 and not ripping the ribbon that attaches the restart/open disc drive buttons to the actual PS2 hardware (as these buttons are on a lid that comes off).
So...
So pull out a bulky crosshead screwdriver, a very small one crosshead screwdriver and your piece of cotton wool (dry and clean

).
Place the PS2 near a wall in your house. Turn it upside down and pop out the plastic and rubber pads (8 in total). Unscrew the screws and place them on the floor in the order that that go in (so you wont get confused when putting them back in).
Flip the playstation over again and pull the top part of case off (CAREFUL OF RIBBON on the right, where the restart button is). Now rest the lid sideways against the wall as you cant take it too far away from the PS2 thanks to the ribbon.
Use the smaller screwdriver to unscrew the lid to the disc drive. Once your in there, swipe the lens with your cotton wool. Just a quick one and dont rub. Remove any hairs with tweezers if you feel like it and put it all bck together.
Now try FF, works like new doesnt it? You may have to do this process once a month depending on how quickly the laser gets dirty again and you start getting disc read errors.