The best way is to create a new project using the New Project Wizard (in the CodeWarrior IDE: Menu File > New) or a project from a stationery template. This sets up a project for you with all the default options and library files included. Then add the existing files used for Cosmic to the project (e.g., through drag & drop from the Windows Explorer or using in the CodeWarrior IDE: the menu Project > Add Files. Make sure that the right memory model and CPU type are used as for the Cosmic project.