That's a shame. I hope you were successfull and found another adopter for this mission.
If it takes more then 10 years in total to convert this BETA into a RELEASE, then the mission surely must be a tough one.
Seriously, I wanted to replay this mission...
and realized that the beta-version around one various servers (march 26, 2001) can not be completed - and there is not even a teleporter-thing and or a corridor below the waggon - as mentioned in this thread.
I noticed that an updated version (december 18, 2001) is around - but the download-links are pretty much hidden.
http://downloads.ttlg.com/download.aspx?id=883
EDIT: hmm.... the updated version seem to be no different. I am stuck below the waggon.
No teleporter, no corridor... just a straight fall into a room without escape.
Am I missing something ?