KNewStuff 2 will have all its files in one dir, one for each app using it. Default will be KStandardDirs::locate("appdata", "addons").
To initialize it call Handler::initLayout();
NOTE: .desktop (metadata) files will be copied in $KDEHOME/services/. You can use KTrader to locate them.
They will be namespaced this way: $appname-$pkgname-$pkgversion-addon.desktop
Packages will be renamed as: $pkgname-$pkgversion.kns
And the file containing release notes will be called $pkgname-$pkgversion.txt
The following layout will be used: