How much difference is there between the 2.0 and 1.6 FLA files. I am attempting to create a DotNetNuke integration pack. However there seem to be no FLA files for the  1.6 SWF Files.

Has anyone had any luck decompiling the 1.6 SWF files?
Is 2.0 solid enough to begin integrating it instead?
How much contract change is there between the client and server between 2.0 and 1.6 is it going to be problematic to move the integration packs over?