[JustAMan]

ixtab,
I tried your latest tool... still crashes.
Here's the trace:

[justaman@localhost kindle-touch-l10n]$ java -jar tool/kt-l10n.jar dist -f -k ~/kindletool/KindleTool/kindletool -s src/5.0.0/ -t update_5.0.0-my-LOCALE_TYPE.bin ru_RU -g tool/KTFrameWorkLocale/glibc-locales/ 
Exception in thread "main" java.lang.RuntimeException: java.io.IOException: Bad file descriptor
   at ixtab.ktlocale.DistributionTask.run(Unknown Source)
   at ixtab.ktlocale.LocaleTool.main(Unknown Source)
Caused by: java.io.IOException: Bad file descriptor
   at gnu.java.nio.channels.FileChannelImpl.write(libgcj.so.12)
   at java.io.FileOutputStream.write(libgcj.so.12)
   at java.io.BufferedOutputStream.flush(libgcj.so.12)
   at java.io.FilterOutputStream.close(libgcj.so.12)
   at java.util.zip.GZIPOutputStream.close(libgcj.so.12)
   at java.io.FilterOutputStream.close(libgcj.so.12)
   at org.apache.commons.compress.archivers.tar.TarArchiveOutputStream.close(TarArchiveOutputStream.java:155)
   at ixtab.ktlocale.util.TGZCreator.createTGZFile(Unknown Source)
   at ixtab.ktlocale.DistributionTask.createKindleInstallFiles(Unknown Source)
   at ixtab.ktlocale.DistributionTask.createKindlePackages(Unknown Source)
   at ixtab.ktlocale.DistributionTask.createDistribution(Unknown Source)
   at ixtab.ktlocale.DistributionTask.run(Unknown Source)
   ...1 more

eureka,
I think I'll give your JS tool a try tomorrow... want to have some sleep once in a while