Well, we didn't do anything for Linux or Solaris but the Nullsoft installer
is IN for Windows. The #1 thing about Nullsoft is the small install header
size - Nullsoft only adds about 50k to the I18N Java Web Start (less for
US-only) and has a pretty good feature set for such a small size.
Nullsoft uses .nsi script files to build installers. The nullsoft source has
been modified from a free distribution from Nullsoft, Inc to accomadate
JavaWS install requirements (internationalization was the big one).
The Nullsoft source is in src/win32/nsis. exehead is the executable header,
which is built and then appended with a data block by the built makenssi,
which is the script compiler.