Gael! He *is* still around after all!
The idea of making some of the other civs playable has been suggested before, but I decided not to do this. There are two main reasons. First, the tech tree is specifically Anglo-Saxon. I could do a "mirror" tech tree for one or some of the other civ groupings, though it would be a big job. But the second reason is more important, really, which is that it would unbalance the game. I wanted to create a challenge specifically for the Anglo-Saxons: see off the cultural challenge of the Irish, cope with the greater power of the Romano-British, ward off the Vikings. It wouldn't be possible to do that if the other civs were playable: for example, the Romano-British would all have to be much weaker. It's a shame, of course, but I think one of the strengths of this scenario is that it's quite nicely balanced as a game for the Anglo-Saxon civs, so there's not much wriggle room for such tweaking.
Of course, there's nothing stopping you from making other civs playable in the Editor if you like. I reckon a human player with the Picts could really cause some problems...
Hope you like it, anyway, especially after your work on similar things in the past... Let us know!