Oh thanks for trying to help  IsaoShi :)  I use Firefox but recently had to downgrade from version3 beacuse of probs. So maybe it mocked up my Orbit downloader, for this is what I got when clicking the above and some other urls from the free-stuff page:

http://sites.google.com/site/bagginsbill/free-stuff/environment-sphere/EnvSphere.zip?attredirects=0

Who knows why.  For the possible benefit to others  I just changed the =0 to one and now downloaded successfully.

I hope you won't actually be reading this till you had your 3 hours sleep :)