I'm happy to announce that the -mod switch version of 77BC is now avaiable here:
Now you can download and play 77BC withouth need to install any other mod. Just use an unmodified BI 1.6 version and install it there. in fact the new download link has all the released hotfixes included.
More and more mods have started to use this feature because it allows to use only one copy of RTW in your hard drive and you can play various mods within it.
For any problem please report to the bugs and ctd thread.