I see you have a release for Solaris SPARC, but not Solaris x86.
Compile the windres/ld binaries as mentioned on the Launch4j website and I'll create the package.
I'm moving this to feature requests.
the issue was copied to http://code.google.com/p/jliftoff/issues/list
closed at http://code.google.com/p/jliftoff/issues/detail?id=43. Please create a new issue if you can compile the binaries.