Hi,
>I can duplicate the old front project to new front project (I think I can do that, what is the normal way for doing so?)
In VSS, you can branch the solution and then modify the branched solution according to your needs.
>When running (the new or the old projects) the old version is running and not the new one.
How did you run the solution? To run the new solution, you can open it from VSS through your IDE and then run it.