Grumpy hit the nail
I am no fileplanet subscriber, so i never downloaded a Direct-2-Drive Game and i dont know how what kind of Image and protection system you get. But it cant be Starforce 3.
After all i know, Starforce is used to check if the CD, or DVD, is a original one, and the Key supplied with the CD is only for THIS CD and dont work even with another CD of same game. So there must be some kind of watermark on the CD which is impossible to clone.
My Version of SH III is the German Release on a DVD-ROM, its using Starforce Protection, thats what ProtectionID told me.