If you mean the front page featured layout you might be interested in our Featured Product Manager, this lets you do alot with your layout and product list displays without having to hack up or modify your x-cart php, tables or admin.
http://www.firetanksoftware.com/fts/customer/Featured-Product-Manager-for-x-cart-pid-146.html
This is an example of an x-cart 3.X site running FiretankSoftware.com featured product manager for x-cart. (it's available for all versions of x-cart)
Everything you see with Red boxes around it including the HTML, product display, side bars etc are all controlled by our add on and you can change the display in seconds.
http://www.firetanksoftware.com/fts/files/screenshots/fts_fpm_screen2.gif