I installed OSA Kit Demo
http://www.osakit.com, and was able to play blitz3d content into Macromedia Director.
I've inserted the OSAKit2.OSA_kit ActiveX control, and when the property box poped up I pasted the game link I wanted to test under FileToDownload. I used "http://www.osakit.com/downloads/Deluxanoid.ply" without the quotes of course
it seemed to work...
Two things though, you cant use lingo to
1 - set FileToDownload of the sprite.
2 - communicate with the blitz3d loaded in your director projector.
I hope future OSA Kit addresses these ActiveX issues.