The work bench allows you to define any number of folders, which are nothing but an abstract container in which you can place other folders or CVS projects. When add a folder into another folder, you will get a nested folder, just like with directories on the file system. When you add a project to the work bench, you will be able to open the project by double clicking on its icon. You will also be presented with the project's details whenever you select it.
You will then be presented with a dialog box asking you for details about the new folder. These details include a "Brief Name", and "Display Name", and a "Description". NOTE that the brief name must be unique amoung all of the folders inside the same folder. This is what jCVS uses to tell the folders apart. You will note that the field is filled in with a funny looking value for you. You are encouraged to just leave that value there, since it is guarenteed to be unique, and you will never see the name anyway.
You will then be presented with a FileDialog requesting that you select the Entries file for the project you wish to add. This is the same method of selecting jCVS projects that is used throughout jCVS.
Again, you will be presented with a dialog box requesting details about the project you are adding to the work bench. Again, the Brief Name must be unique, and you are encouraged to leave it set to the default that was filled in for you automatically.