Accessing the feature is simple, however, keep in mind that this does not create a new project/solution by copying the current files into a new project. Rather this feature adds the project/solution files to the folder you select.
Select File, New, Project From Existing Code (figure 1).
Select the project type you want to generate (figure 2)
Select the location of the code files, provide a name for the new project file and select the project output type (figure 3).
While this is not one of the revolutionary feature enhancements in VS2010 it does provide a nice service and one of many functions added to simplify the development process.