It's been awhile since we have touched base, and thought I would let you know.
ALL of my engines have been updated to Trainz 12 "standards" (0 errors, 0 warnings) and will be available soon on the DLS. I have NOT done anything about the textures, (not sure what / if anything needs to be done) but at least they are error free. Had one person inform me of an issue with multiplayer, resolved that issue also.
I'll post on the Tranz forum when they are available.