I can't open your link.
Anyway, do like this:
Delete everything in the script until [ParserScriptAlbum]=... and replace it with this:
[Name]=beatport.com
[BasedOn]=http://api.beatport.com
[AlbumUrl]=http://api.beatport.com/catalog/releases/detail?v=1.0&format=xml&id=%s
[SearchBy]=%beatport_release_id%
[ParserScriptAlbum]=...
I have used [SearchBy]=%beatport_release_id%. If you have already stored the ID in another field, insert its name here.