While there is not manual for that, I am aware of
Honestly there isnt much you can do with it from the command line anyway
Except in dealing with installation and startup parameters
The startup settings are kinda not all working or undocumented
Here is an example of how to install multiple instances
There is a readme.txt in the root of the twonky server install
that talks about the limited things that can be done
Twonky (How to run multiple instances with custom Navtree's)
http://twonkyforum.com/viewtopic.php?f=2&t=9408
However, there is this for web based administration
Which is probably what your looking for
How to manage Twonky Server with URL RPC GET SET commands
http://twonkyforum.com/viewtopic.php?f=2&t=9364
TwonkyServer INI Configuration Settings
http://www.twonkyforum.com/viewtopic.php?f=2&t=9497
Is there anything in particular you are trying to do,
or just looking to see what is possible?