I *finally* got this stupid thing to install as a plugin in Eclipse.
What was the trick? Trying progressively older and older versions of Eclipse, until the stupid thing worked.
It finally worked with Eclipse version 4.3.2 (Kepler SR2)
You can get that version of Eclipse here: Eclipse Kepler SR2 Packages | Packages
Now, hopefully, installing Adobe Flash Builder 4.7 Premium on top of this as an Eclipse Plugin will also work. I'll post a response if/when I have success.
Ok... Adobe Flash Builder 4.7 Premium won't install into an Eclipse 4.3.2 environment... It says it needs 3.7 or 4.2... So now I'm downloading Eclipse 4.2.2 from here: Eclipse Juno SR2 Packages | Packages
Hopefully CF Builder 3 will install into Eclipse 4.2.2. We shall see.
ColdFusion Builder 3 WILL NOT install into Eclipse 4.2.2. :-(
I hate Adobe and their crappy software!!!!!
Well, I guess this is the answer if you're trying to install CF Builder 3 into Eclipse. You have to install it into Eclipse 4.3.x -- no other version, older or newer, of Eclipse will work with CF Builder 3.
And if you're trying to install Flash Builder 4.7 into that same Eclipse install? Not gonna happen. Simply not possible. Can't be done. But if you don't need Flash Builder 4.7, then you can get CF Builder 3 installed properly with no problems into your Eclipse 4.3.x installation.