1) the bdg.txt messages are normal after changing patch versions, as bdg.txt variables
are different - usually simple ones in lower patch versions give way to more elaborate
ones later. You will only see that notice once, first time you run the new patch.
2)"twitching" AI should be pretty much eliminated by the 2.11 patch. You may still see
a bit of odd behaviour if you zoom your view to look at a formation of planes in the
far distance, as you will be peeping at the tricks BoB uses to manage vast numbers
of planes in the air at once. Close up, you shouldn't see any of that.
3) support for WinAmp is built in, just search the manual for "winamp". You can load
whatever playlist you like. You just have to have winamp loaded when you start the game.