An alternative to making a long horizontal menu under your banner for your categories would be to create a small menu block on the home page that has the categorie links (with or without graphical buttons) which would do exactly the same thing as a horizontal menu button would. Just takes a little adding of HTML to do this if you have the knowledge to create a vertical menu. Then add that to the page on the left or right side and that should work great for your needs.
The only other way to accomplish this would be to create extra pages, which you can create up to 5 of them in the SCC programs. You can add anything you want to on those pages, including your category links etc. Granted, if you have a whole lot of products this will be tedious work to recreate all the image placemarks for each of your items in a separate category page, but it can be done none the less, just not automatically is all.
I too wish it had more features like this, but hopefully given time we'll see additions like this in the future. Best thing you can do for now on this thread is to post something in the Suggestions thread(s) to ask for this feature. Always remember, asking for anything in life is the hardest part, and the worst that can happen is they will say no right?