That is a good question i would also like to know just in case mine craps out because my PS3 is out of warranty. I've never tried it but i hear it can be done. Check out the link.
Here is the deal. A disc got stuck in the ps3. I opened it up and fixed the problem. Part of the mechanism was not in place. But when I was doing that I basically ruined the circuit board of the blue ray drive. Now I dont know what to do. If you have any ideas. Is it true that when you replace the blueray drive on a ps3 you have to swap the old blue ray drive circuit board into the new blue ray drive? Is there a way to change the blue ray drive without changing the circuit board? Please help.