A new version of LibZip for iTunes (2.6) has been released that supports splitting very large zips files (larger than 4GB) across multiple zip files.
This also includes EasyShare support for sending all of the multiple zips files after zipping.
MarkelSoft Product Blog (http://blog.markelsoft.com, http://markelsoft.com)
A new version of LibZIP for iTunes 2.5, has been released. This version has some new unZIP and ZIP options.
unZIP options: automatically add tracks to iTunes, unzip from share folder (file transfers)
ZIP options: share after ZIP