Hello,
It is true that for the tasks you are describing, you must first create a working copy folder on your PC and then within EA define the VC configuration that you will use.
Once this is done, you can use either "Import Package from XMI file", or the version control command "Get Package" to import the root package of your model. If the model packages were added to VC using the option "Save nested VC packages as stubs" (which is on by default), then you will still need to populate the package stubs, by importing their respective package files.
The intended way for you to do this, is by using the "Get All Latest" command, which will recursively populate your entire model.
New functionality, introduced in EA 7.1, allows you to export any VC package as a "model branch". (For example, the Model Root node, or any one of the View nodes.) These model branches can then be imported into other projects, or by other users, with the command "Import a Model Branch", which automatically performs the "Get All Latest" after importing the specified root package.
"Import a Model Branch" will also allow you to select a file from disk, without having the VC configuration defined beforehand, although you still need to have the working copy folder present and populated before invoking this command.
regards,
Howard.