Yes, you may be able to use some 1:1 Copy programs, but that doesn't work in all Starforce protected games.As i said Splinter Cell took 6-7 months to be able to be copied and played with Daemon-Tools or no CD etc etc..Starforce did it job very well,the game was awesome and it was running smoothly on every single pc.
It depends on the implementation of the protection on your game/program and how "deeply" you intergrate the "protection" in your code using the SDK from the protector/packer etc.
You can't judge a protection because some games have poor implementation of it (Like Silent Hunter II).

PS. Let me make something clear so i won't be misunderstood.I'm not supporting any kind of protection or i'm not on anyone's side.I just don't like saying that something is crappy because someone doesn't know how to use it right.We all know that something that is locked, it can be unlocked somehow..The purpose of these protections is how long is going to take until it is unlocked, in the case of Starforce it did it job very well.