Flash CS5 and updating to flash 10.3 and AIR 2.7

Question

Hi, I have a simple question, but for the life of me I can't work out how to solve it.
I'm currently running Adobe Flash Professional CS5, and would like to update it to utilize some of the features in AIR 2.7 and Flash 10.3 / Flash 10.2. How do I do this?
I encountered a similar problem a ways back when AIR 2 was being released, and I had to resort to ultimately "overlay" the existing installations. I've looked around and found some similar third party resources pertaining to the latest updates, but I've failed to get them to work - some instructions for adding in 10.3 as a build target compile, but they don't seem to be running in 10.3, or the debug player is not running in 10.3.
Am I missing something really obvious? I'd think that when a major release is made, it should be straightforward to update your version of CSx to target that release, but it's anything but. I found the release notes for Flash 10.3(http://kb2.adobe.com/cps/901/cpsid_90194.html#main_authoring), and under authoring it says:
"Developers can access new APIs in the Flash Player 10.3 by making manual changes to their existing SDK/tooling configuration. To learn more about the new APIs, read the online ActionScript 3 reference documentation. Adobe Flash Professional CS5.5, Flash Builder 4.5, and Flex SDK 4.5 will not be updated for the new runtime."
Where can I find the manual changes required? And why do these releases require manual overlaying anyway?

Answer 1

Thanks for the reply.
After alot of messing around I managed to get Flash professional to have 10.3 as a target, and also managed to get a 10.3 version of the debugger to run when you select Debug Movie(Running Test Movie, which is what I usually do, still uses the original 10.1 player, and I can't find out how to update it). I'm not sure if it's buggy or I've done it wrong, because when targeting it to 10.3 and running my application through the 10.3 debugger, I seem to be loosing frame labels in some of my movie clips, getting an error:
ArgumentError: Error #2109: Frame label off not found in scene off
This is odd, because
a) I don't get said error when running with Test Movie which uses a 10.1 version of the player, and I never had it before with other versions. The symbol triggering the error clearly has a frame labeled off
b) There is no scene off in my project, I only have one scene which was the default, and it's called Scene 1.
Doing some traces, it turns out that the object is not having it's frame labels read in the 10.3 player, which is very odd and indicates to me some kind of bug or incorrect installation, but since I get the exact same error running it under the 10.3 projector, I'm inclined to think bug .
With regards to AIR 2.7, why do we need CS5.5 to use it?