I played around little bit with eclipse and phing and wrote build.xml file for creating translation packages.
I tried making script as universal as I could with my poor knowlidge

Idea is that You have some dev projec in eclipse to maintain translation files and one for preparing packages.
So phing is copying site and admin files prom dev project to storage project and prepares packages.
On my test server all Joomla packages were working, but I had problem with tinyMCE, I belive there is something wrong with zip compresion, because if I zip files manualy package is working.
I hope it will help somebody
