Justin suggested that the installer should save downloads in a central location on the users computer so that if multiple SDKs are installed that use, for instance, the huge AIR SDK, it only gets downloaded once.
That seems like a reasonable idea to me. Any thoughts on where to store these downloads? We could try to find the Downloads folder on a user's computer but I think that there is no such thing on WindowsXP. We could use the application storage folder in AIR, but that's hard to find and clean out. Thoughts?