Don't know about the first question, but on the second; Copy Font Files doesn't seem to work in SKS6.
But if you manually copy the font file to the skin folder, then open SKS6, open your skin, click Change Skin Fonts and click Included Font Files, the font you copied will be in the drop down list.
I haven't zipped a skin for distribution after doing that to verify that the font file is actually in the WBA, but it should be there.