Bloody fucking hell. 3 screws stripped beyond all repair. I spent $20 on this damn 10-piece bit-changing screwdriver. For nothing. Pliers were the ONLY way to go. Couldn't even find my thinner needle-nose pliers, so I had to make do with a set of giant, groove-joint pliers.
Bah. Long story short, I had to use the pliers on the 3 remaining screws, and since my motherfucker was so large, it was deucedly difficult to "grip" the 1mm edges of the screws, particularly on the "weaker" side of the HDD tray. I wound up badly distorting this weaker side, almost tearing one of those thin metallic "ribbons" holding the screw in place.
But, once the 3 mangled screws, 1 solid screw were extracted, swapping out the HDD was easy. I my fingers to set the 4 screws back in place, then the ginormous pliers to tighten them (only somewhat!), set my PS3 back up, and I'm good to go. FYI, I did decide to add a jumper shunt to the new HDD to limit the drive to SATA 1.5.
Just under 300 GBs of goodness. I decided to alot 10GB to a potential Linux partition I'll probably never, ever set up. Now the shit's restoring from my iPod (and taking almost 2x as long as the backup did), and I'm dirty, hungry, and annoyed. And somehow, I'm bleeding under a fingernail. Just waiting for this to finish so I can plop the old PS3 HDD into my new 2.5" enclosure and effectively had 60GB more to my PC.
*shakes head*
Were it not for those 4 fucking screws on that fucking HDD tray, the hardware end of the process would have taken no more than 10 or 15 minutes. Not the 1+ hour this took.