Start a Tapegerm project by going to your profile (click your name in the top menu), then click the "Projects" button tab and then click the "+" button to add a project.
Give your project a title and then tell us about it. There is no set way to do a project, so what you do is up to you. If you want to collect submissions for an album with a deadline for entries, include that information as well.
You may upload source files (zip compressed) up to 128MB. You may also link to files hosted elsewhere if you wish.