This is the default theme bundled in P4A thus you’ve not to download it separately, anyway if you want to download it separately:

Screenshot:

Download:
http://sourceforge.net/project/showfiles.php?group_id=98294&package_id=193551&release_id=433285

This is the theme from Tango project:

Screenshot:

Download:
http://sourceforge.net/project/showfiles.php?group_id=98294&package_id=193551&release_id=433287

Crystal icons are realized by Everaldo: and are released under “LGPL” license.

Screenshot:

Download:
http://sourceforge.net/project/showfiles.php?group_id=98294&package_id=193551&release_id=433286

Official websites:
http://www.everaldo.com
http://www.yellowicon.com

Extract it where you want, open the index.php file of your application and write:

define("P4A_ICONS_PATH", "/path/to/the/icons/directory");

write us and we’ll package your desidered icons!