Changing HDD in the ps3 is very simple here's a tutorial.
http://2.ly/QND
Yes, it is possible to swap HDDs between PS3 slims and PS3 fats. Simply remove the hard drive from both your PS3s and switch them. All your saved games, music, and movies should all be on your Slim PS3.
Yes.
Is PS3 doesn't work any-more you can swap the HDD's or you can plug both drives form the two PS3's to the computer and copy the files over. If you have stuff on there from the PS Store you could just link your PS3's and download the files again onto your other PS3.
No you cant!.
Yes but its only for the internal one not usb hdd.
Yes they both have standard notebook HDD
time to buy a new HDD for the PS3. I've had this problem before and I took the HDD out of the PS3 and was testing it in a PC, found a bunch of bad sectors. Bought a new HDD from Tigerdirect.com and it totally fixed the issue.
When I upgraded my HDD I bought an external HDD backed up ALL of the data on my PS3. Then I suppose you could copy that onto your PC. TO get it back to your PS3 system you would have to use an external HDD and just copy everything over. Or use lots of Memory Sticks.
Simply no bc the hdd`s content is encrypted to your ps3 serial number, so in other word just format it and begin all over.
That depends on what 'dead' means.
Yes & No you actually can swap the hdds but they are new so i am guessing you can back up on to a memory stick and copy to the hard drive then I added a link to "Can I upgrade the hard disk drive (HDD) inside my PlayStation®3 computer entertainment system?" that includes trouble shooting procedures. It may be of help and is part of the Playstation Support and Knowledge Center
Yes you can upgrade the HDD on a PS3. Not sure whether 360HDD is available in standard notebook size, but 320 HDD is and I some larger more expensive sizes are said to be available.