X-Cart Mods: Marketing Manager Professional 3.0 Bundle for XCart:

"Simply the most advanced collection of x-cart Add on's available in an incredible single purchase bundle. The HIGHEST compatibility ratio on the market, compatible with all xcart versions from 3.2.2 through to the latest 4.X branches. Proven, tested, mature. Unlike other modifications Firetank Add ons are expertly engineered specifically NOT to interfere with your x-cart system, it is does not affect your upgrade paths."