Rearrange keycaps on '09 MBP?
Rather than explaining it myself through text and possibly sounding confusing, I'll just link this video: https://www.youtube.com/watch?v=kh88cn_rtLo

I've popped off keys before in the same way he did, and it works just fine. Obviously for rearranging your keys in a Dvorak layout, you'll want to pull up a reference image on screen of what a Dvorak keyboard looks like, in case you haven't memorized it. And then just pop all the keys off, put the mechanism parts that go under the keys back on, and then put the actual keys on in the proper arrangement.

And it sounds like you've already switched your system input layout to Dvorak, but in case you haven't, it's really simple. Just go into System Preferences, then to Language &amp; Text, then the Input Sources tab, and check Dvorak. Then check "Show Input menu in menu bar" and in the menubar you should see a new icon, and it should be the flag of your country keyboard layout if you haven't changed it before. Click that and you should be able to select Dvorak.