The Oobs cover a time period of 1809-1812 for the most part excluding the Peninsular war. So no England or Prussia as a major power ( Prussia is there but very limited as a minor nation). There is a mod bring England in but it is basically repaint of French uniforms I believe. The main problem with development with this title is that its a one man show,there was no development team . If thats changed in the last 6 months since I stopped playing I can't say for sure. At that time the game had a fair number of bugs both graphically and AI logic wise and Multiplayer was a mess, connectivity issues with TCP/IP and PBEM was all but useless.
If JMN can squish the worst of the bugs and bring in the later oobs as originally intended it will be a good game. At that point I would be willing to re-install it.