First, you have to download the RSW script (donwload it here). Then, upload it to your server. Open your website from the browser and you will redirected to installer page, which look like this.
Fill the text box with your setting.
Database Host is where your server host MySQL. Usually “localhost”. Database Username and password is your database user setting. Database Name is the database you're using for RSW. You have to create database for RSW first.
For the admin setting, input your admin information correctly, especially password because they don't ask to repeat again (I will add repeat password in the next version).
After finish fill your setting in, click “Submit” to install RSW, or “Reset” to clear the input text box.
After complete installing don't foget to delete file “install.php”!!
You can also delete file “ins-style.css”, “image/ins-footer.png”, “image/ins-middle.png”, and “image/ins-upper.png”. But the file you must delete is “install.php” because it contain everything to setup your website.