Create workers for android?

I have downloaded and overlayed the AIR 4 SDK, which supports Workers on Android.

Yet in Flash Builder 4.7, when I try to create a Worker via the menu, I get the error message:

"You must create a Flex or Actionscript project to hold this file"

How to

1) Work around this to get Workers working on Android/Mobile even if not via the menu?

and/or

2) Get Workers working the way they were meant to work in Flash Builder, on Android/Mobile?

Thanks,

David