XpertMart is an advanced Point of Sale and Inventory Control system, so you will actually be installing three separate programs. Since XpertMart is written in Java, you will be installing the Java Run Time Enviornment, since it runs on a true SQL database server, you will be installing InterBase database server, and then of course the XpertMart specific files. So the instalation process will involve a few more steps, but the benefits are well worth it. Once you have downloaded the installation files you will need to follow the steps described here to complete the installation