MagicDKP Database uses the getdkp.php format from EQDKP Plus. If you
have EQDKPPlus installed you should be able to access:

http://yoursite.com/dkp/getdkp.php

Save the data in that file as dkp_list.php in this directory.

You can also use the executables from this download
http://sourceforge.net/project/showfiles.php?group_id=167016&package_id=240020
to automate the download process.

Note that you do not need the GetDKP addon enabled, and in fact I
recommend against it since it might conflict with MagicDKP Database.

