Flex 3 SDK with Eclipse

Hey guys! I have been usign flex with eclipse for a while at work, but I never installed it myself. I know that the flex 3 sdk is out there for free, same as eclipse. I am trying to install the flex sdk so I can edit and compile AS3 in eclipse, but I don’t know how. What about flew builder? I know that the version 3 is paying, but is there a free version? I am kinda lost about the differences in the SDK and the builder.

I installed eclipse and downloaded the latest flex SDK. Now I just don’t know how to use the SDK in eclipse. Any one can guide me?