I'm using 4.2 and it seems to open OK and play a couple of turns.
@kossin -Spoiler :the new map (pig, rice) has 8 AIs, not 10 as originally intended![]()

another suggestion would be 1NE ... sure, you'd miss a turn and the rice (which can be used otherplace through) but its riverside, you get some more Grassland (which otherwise likely would be wasted, due to no seafood) and you don't lose Flood Plains

but gain at least 1 forest which can't be used for quite some time (2w of warrior)
Very nice ...
I need to sort this out ... I hope I don't have to reinstall Civ4 Vanilla because that is an even WORSE pain than reinstalling BtS ....