Ok, seeing as the complete PDFs of the entire Star Frontiers line are available for free at the web site noted above, I decided to post my playtest files.
As I said earlier, during the playtest of Basic Roleplaying, my group and I converted tons of settings to see how they held up. Star Frontiers was one such setting.
The following files have been uploaded.
A Players Book http://basicroleplaying.com/downloads.php?do=file&id=539
SF-0 Crash on Volturnus, the first adventure http://basicroleplaying.com/downloads.php?do=file&id=535
Creatures of Volturnus - A book of converted lifeforms http://basicroleplaying.com/downloads.php?do=file&id=536
A "partial" GM Screen. http://basicroleplaying.com/downloads.php?do=file&id=537
Their not perfect, and were never really meant for outside consumption.
Oh, you'll need the original maps to play the adventure. They can be found here http://www.dwdstudios.com/sfdrdownloads along with the rest of the original Star Frontiers stuff in PDF format. The maps are in the Alpha Dawn Digitally Remastered PDF.
Rod
Edit: I found the cover I did for the Star Frontiers Player Book and added it.