More info. click here is the site given on the PCA CD and DL 5 is $19.95 download or $29.95 plus delivery for book and CD. click here has DL4 as new! and at £25 download or £30. It also seems possible that the 125m names are available for free search for 30 days with vers 4DL but they are UK.Not clear what is available in UK on 5DL.