A quote from flashkit.com
I dont use Flex but I use .swc files with Flash all the time. Did you try adding the swc to your components folder so they show up in the components panel? (make sure to restart Flash)
Adobe Flash CS3\en\Configuration\Components
Local Settings\Application Data\Adobe\Flash CS3\en\Configuration\Components
How to include all the flex components and libs to flash cs4.
I wanted to work in flex using flash cs 4 ide.
Which files do i need to copy to the components folder?