Adding module variations to main content area

I would like to add a module variation to the main content on the front page (grunge5, etc.). Is this possible and how?

- Go to your Extensions menu and choose Module Management
- Look for the module name your want to modify and click on it
- Once you're seeing the options screen, in the right panel click in Advanced optinons and type the module variation name you want in the 'module suffix class' field.
- Save changes and you're done.