If you have modules or class modules that you use all the time in many of your projects, you can add them to the Templates directory.  It is usually located in the VB directory (often C:\Program Files\DevStudio\VB) and is called Template.  Under the Template directory you will find several directories that correspond to the types of files you can add, such as Classes.  Just copy your source code files to the appropriate directory and go try to add the file to the project. Your files will appear under the New Tab.