Campusman, welcome to X-Cart! Please start by reading the forum rules, and posting your X-Cart version in your signature:
http://forum.x-cart.com/viewtopic.php?t=6489
Next, try the manual, found here:
http://www.x-cart.com/xcart_manual/compiled/X-Cart_4xx_manual.pdf
If you still have questions after reading the manual, please search the forum first, and if you still can't find the answer, post a question. Thanks!