Will use...
SocksPort 9152 ControlPort 9153
Will use...
SocksPort 9152 ControlPort 9153
Tor Messenger Release Announcement:
https://lists.torproject.org/pipermail/tor-dev/2014-December/007981.html
With these small changes, (technically only https://github.com/Whonix/anon-ws-disable-stacked-tor/commit/275f072b03510324c6e8cdf3556b1d1a83cc90ca matters) I managed to get Tor Messenger to establish an IRC connection.
Current Status:
When manually downloading Tor Messenger in Whonix 10, it will work out of the box and without Tor over Tor.
(Will work similar to Tor Browser and https://www.whonix.org/wiki/Manually_Updating_Tor_Browser when manually downloading it.)
In future, when Tor Messenger is released as stable, then tb-updater can be transformed into tpo-updater. To make this possible, posted feature request.
use a download similar folder layout as TBB:
https://trac.torproject.org/projects/tor/ticket/14385
For now, there is nothing more than can be done here before Tor Messenger is released.