All the blocks and elements for the theme can be changed and replaced with any element via Blocks (Layouts) section of CS-Cart admin area. Any other blocks can be added to any theme page via the same section (banner, product listings, categories listing and etc.).
You can easily add one or two column to the home page (or to any other page) via CS-Cart admin area. No core affection approach is used during the CS-Cart skin creation, so all the default features of the CS-Cart that are included to the software are included to the template in full. Only CSS style files are changed for the template that allows to avoid any mess during CS-Cart version upgrade.