I'm fairly deep with Flash CS4 project. I've got Flex Builder now, and I want to use it. I have .fla file and couple of Classes. .fla file is actually one ActionScript Frame document with Library items with linkages. I want to do .fla file skinning in Flash later, but develop with Flex. Can you help me with importing. I've never used Flex Builder before.
Write your .as classes in Flex Builder (or Flashdevelop 3 which is actually a better coding environment than Flex Builder). I don't think you can edit .fla files in Flex. You can do pure as3 projects in Flex if you wish.