A symlink or symbolic link can be easily created in Widows Server 2008 to share a common folders or files amongst projects. Lets assume you have a folder in domain1.com called CSS and you want to share this folder with domain2.com. You could just upload the CSS folder into domain2.com but then you need to FTP and update the CSS folder in 2 places. If both sites are using the exact same CSS this could cause you issues over time as you might forget to roll out updates from one site to another.
At present if you install Wordpress as part of the Web Platform Installer it does not install PHPMyAdmin for you. Luckily this install is very easy to do.
Head over to http://www.phpmyadmin.net and download the latest installer to your server.
Once downloaded unzip the contents of the file and rename the folder to 'phpmyadmin'.
Copy this folder to your website containing Wordpress or php.
Open the file config.sample.inc.php into wordpad (notepad puts it all on one line) and enter in a new Blowfish_secret. It can be anything random like a password.