Thanks Josh2, it's a tough one to crack but i finally got there just the way you described.
It went a bit tits up for me after that when i was installing the HD into my computer... my unplugged WD caught an arc from the power plug (Computer was on and the plug was out, but a little too close)...
It is the 250 that I'm having trouble with too, I can't see it being different to the 400 stated in this thread.
I've managed to push the bottom tab in as far as it will phisically go (I think to a point where it is usless as a tab, so thats broken already) and I can push the top tab in until...
I too would like tips,
I've removed the screw, and found the tabs, I can push them in slightly, but the sleeve does not come off, it just wont budge! Is heavy-handedness and brute force and ignorance the way to go here, or should it separate easily.
I don't really want to bugger up the case...