I can do that...just discovered that, but this is what I did originally.
Right click on a blank section/corner of the "background" (shelf) behind the AWN icons. You will get a menu of items, choose "dock preferences."
Left side bar of the opening window you will see "launchers" - click on that. and then click on +Add in the new right side bar.
You will get a new Launcher editor window...
to get Firefox, for example
Name: (type) Firefox
Description: (type) browser
Command: (type) firefox
left click on icon box, the rectangle on the left, click on "Stock/In theme" and scroll around and click on the Firefox icon, click OK.
click on OK...
That is the process I used to add apps to AWN.
You should now have
Malachi 3:10 NRSV
...says the LORD of hosts... I will not open...windows...for you...
Linux user since 2001 pda; 2006 lappy