After being AWOL from AH for several years, I'm going to jump back into the fight

I have finally gotten broadband, which I expect to increase my enjoyment a lot. Since the conversion to AH2 is imminent, I have decided that I would rather install that version than the latest "legacy" version of the original AH.
So here's my questions:
1.) Do I need to install AH1 in order to install AH2?
2.) Is the TA active and operational in AH2? If so, are there any trainers working in there yet? I need EXTENSIVE retraining, LOL

3.) I got the impression from somewhere that you had to go out and get AHVoice.exe and install it separately from the game. But when I click on the link to download it, it doesn't exist. And I can't seem to find it anywhere. Is it now included with the game files? IOW, does it install along with the game?
That's all I can think of for now, thanks for any help you can give me!