Flash islands

Hi All

I want to start developing an adobe flash island component.

I understand that I can only develop in Flex SDK version that is lower then 3.4.

My problem is that I can only download adobe flash builder 4 (this is the only version purposed in adobe.com) .

In this version the compiler can only run SDK 3.5 and higher.

Can any of u tell me how do I get adobe flash builder 3, or any other idea how to solve the issue?

Thanks

Nitsan