HALLO MALCOLM!
Hehhe, here we are again then...
Yeah, the more I look at RTW the less hopeful I am. I think we have some good ideas but this will take a hell of a lot of heavy modding to make it work at all.
Problem is that neither I nor you it seems are exceptionally well up on modding expertise, not least knowledge of the programmes/gamedata.
However, it does seem that if HTW and NTW made possible such leaps from the MTW engine then surely something resembling a naval battle MIGHT be moddable from the great range of units and gaming possibilities that RTW supports. How, is another story...