1. When flying AH do most people fly in Advanced Mode? There really isn't any "easy mode" in AH. You can use Combat Trim which automatically trims your plane for you according to predetermined settings for different speeds, but you'd be better off flying without it, IMO. For me it did nothing but degrade my flying. Another feature that can make things easier is auto-takeoff.
2. Is that the same as advanced mode in FA2? Never flown FA2
3. Is there anything like Arcade and Intermediate mode in AH?
The closest thing would be the training arena. It has unlimited ammo and the planes absorb more damage. Another possibility is to check out the H2H arenas set up by players. He who sets up the arena determines the settings for that arena (damage, ammo, etc)...the physics of how the airplanes perform, however, are a constant in the AH.
4. What is the difference in the viewing system i hear so much about compared to FA? Aside from the being able to look in every direction imaginable with the number pad combos, you can also move your pilot's head around in the cockpit to see around cockpit rails, headrest, etc. Don't know how this compares to FA2.
5. In general is there a difference in the plane physics between AH and FA? Almost certainly, as they were made by different companies. As I said tho', I've never flown FA2.
6. What is a resonable PC spec for AH? Your first concern should be your video card. Geforce 2 or better should do it. High end Pentium II would work fine with a decent video card, and a PIII would be better.
7. Are you guys using Roger Wilco? Yep, it's even integrated into AH, so you can tune to radio channels using the in-game text buffer.
8. Do AH have similar Territorial Combat concept as FA? Not sure what ya mean. In the MA here, there are 3 sides, all of which start out on equal footing. The way to "win" is to take all of another country's bases. When one country is finished, the country with the most bases remaining wins.
Good luck, I hope you enjoy it. If you need any help and you see me online, feel free to annoy me.
SOB