Requirements:

1. Install the Force.com Migration Tool: 
http://www.salesforce.com/us/developer/docs/daas/index.htm


Usage instructions:

1. Create DE org
2. Whitelist IP address
3. Go to Setup > Customize > Cases > Assignment Rules and delete "Standard"
4. Go to Setup > Customize > Cases > Esclalation Rules and delete "Standard"
5. Edit System Administrator profile to change default app to Sales
6. Add org admin credentials to build.properties 
7. Execute "ant cleanDEE"
8. Go to Setup > Data Management > Mass Delete Records and go from bottom to top and delete all records.
9. Go to the Campaigns tab and delete records manually
10. Go to Setup > Administration Setup > Manage Users > Roles and delete Roles
11. Go to Setup > Administration Setup > Manage Users > Queues and delete Queues