I haven't used AD2 stand alone and also haven't done the demo, so not sure on Q1. What version of sonar do you have? AD2 comes with platinum and also comes with 3 adpaks.
You mention that you've purchased the metal adpak, but your note says you're working with the demo version of AD2. Maybe that's not correct.
For the drum map, yes that link is the way. Because it's a pain I don't use a drum map.
In sonar, when you insert AD2 and open it. You'll get a screen with buttons at the top. Select the explore buttone and you can scroll forwards/backwards to find a preset. If you click the kit button you can select individual pieces and build your own kit.
The ? brings down a menu and you can select the map window. That shows you the drum to midi note mappings. If you take any midi channel, point it's output at AD2, and transpose the note to the correct one for whatever drum you want in AD2 as found in the map window, it will work.
For instance, if you have a midi snare track, send the output to AD2 and assign the hits in the track to note 38 (open snare hit) and it will work.
I like to put my individual drum pieces on separate tracks, if you have a midi file with all the drums in it, you can use a cal script to convert the individual notes to tracks.
If you want to use beats from AD2, select the beats button at the top and find one you like. Also, you can drag a beat from that window to a midi track in sonar. I find that an easier way to work with a beat. I can then modify it, loop it, or combine it with beats from other sources in the midi tracks.
gabo