Select RackSpace from the available CDNs
Account name: Will only be used at Vuhuru, to help you distinguish between multiple RackSpace accounts
Username: Copy the user name from the API daskboard in RackSpace (see image in Step 2)
Secret key: This is where you paste the API key you copied in Step 2
Account base: Select either UK or US depending on which service you signed up for
Once you have filled all four fields, click Save RackSpace Account