Config File Editor:

is a program that enables you to edit configuration files
on your DiskStation without the need for learning command line VI or moving
files from and to your DiskStation. When first started, it will copy existing
configuration files as a backup. Therefore, if you messed up a configuration
file, you can always hit the 'original' button to get the first backup back.

URL: http://www.mertymade.com/syno/

Anpassung an DSM 6 sowie Sprache in Deutsch / Englisch

URL: http://www.synology-forum.de/showthread.html?76365-Config-File-Editor-f%C3%BCr-DSM-6