Install the marketplace extension.

Make sure after you install the model and login again. Otherwise you will the 404 error page
Modify the Header part

The default customer.xml is not work, it was rewrite by the new theme local.xml file.
Add more products and category
Add the featured products and feactured seller in the homepage

Create a customer template named featured_products.phtml. And copy the print the seller's code from the marketplace.phtml to the new template of featured_products.phtml.
Add the Products, Designers and Category.

- And make the each featured block in homepage
- Update the css imgae size
Add the featured Categories to the homepage

- Install the feactured categories extension
- Copy the sql select statement from Featuredcategory.php to the featured_products.phtml
- Modify the fetch image function with $cat->getImageUrl()