In Roberto Farah's most recent post he mentions the command .cmdtree which is available since version 220.127.116.11.
The result looks amazing and makes debugging with windbg a lot more productive and it makes it much more useful for especially for newbies:
I've put the text file proposed by Roberto on my public share for your (and my) convenience and added some stuff, that I found to be useful...
Currently I don't know how to put comments into this file format.
If anyone can tell me I would like to add a tribute notice into the text.
PS: Unfortunately I was not able to set the command .cmdtree CMDTREE.TXT as initial command via -c switch in [HKEY_CLASSES_ROOT\WinDbg.DumpFile.1\shell\Open\command]. For some reasons windbg doesn't find the file via startup command. Any advice on how to achieve this is welcome.