I am confident the syntax is correct and have tried entering them with DW edit and FCKGlite as well and links created with either will not launch when clicked. I can copy shortcut and paste and it will work
Create symlinks to your directory shares, using mklink in dokuwiki/data/pages. Then you can refer to the files in your shares as though they were files in a namespace.
Example. From the command prompt window:
mklink /D "E:\apache\htdocs\dokuwiki\data\pages\other" "\\TEST\docs\tmp"
This will create a symlink in data\pages named "other" which will refer to the share folder \\TEST\docs\tmp
Then in your Dokuwiki page you can refer to [[:other:file.txt]]
And when you open the internal link dialog in either fckgLite or in the native Dokuwiki editor the namespace other will appear in the directory listings.
To use mklink you must open the command prompt window as administrator, which you do by right-clicking on the icon and choosing "Run as administrator".
To use mklink your OS must be Vista or later (i.e. Win7).