If you are going to do any kind of work with that set of scripts, I very strongly advise you to read up and learn mysql and php. Those are two of the most essential tools, behind html of course, that any person doing web development needs to be very familiar with.
If you have the table definitions get your hands on a copy of navicat, and import them thru that.
Navicat is a nice GUI tool that makes working with mysql a snap. If you are cheap, set up PhpMyAdmin on your web server.
Once you have imported the database definitions, set up the shop configuration php with the database names, server & login info for both your itemmall mysql and rohan MSSQL databases.