"BonhagenMod.zip"  is a  cross between two older versions of "rnd_jue"
[Jürgen Bonhagen's levelset collection for Rocks'n'Diamonds]:

      rnd_jue-v7.zip      - A version dated Christmas Eve, 2005

      JuergenBonhagen.zip - A version dated January 12, 2007

"BonhagenMod.zip" uses most of the levelsets from the January 12, 2007
version. Two levelsets are omitted.  The "levelinfo.conf" settings are
based on the Christmas Eve,  2005 values  [which are  more  flexible].
Additionally, some of the  directory names and/or  levelset names have
been changed. For example, the collection itself has been renamed from
"rnd_jue" to "Bonhagen".

The Christmas Eve, 2005 version was obtained originally from:

      http://www.jb-line.de/rnd_jue-v7.zip

The January 12, 2007 version was obtained originally from:

      http://www.bd-fans.com/Files/RnD/Levels/JuergenBonhagen.zip

Note:  These URLs were  valid as of mid-2007.  However,  they may have
broken since then. You should be able to obtain  all  three  ZIP files
[BonhagenMod.zip, rnd_jue-v7.zip,  and  JuergenBonhagen.zip]  from the
same site as this file, regardless.