I created an application which installs/updates ESET definitions in a directory of your choice (might also be a removable media). Once the installation has completed, user simply needs specify that directory as the update source within the ESET configuration panel (only once), then update the product.
Updates are published daily at around 17.00 CET under the name "ESET Offline Cumulative Updater xxxx" at http://jeanrapidshare.blogspot.com
(about 35 MB). Download links are Rapidshare.
The latest available update is ESET Offline Cumulative Updater 4027 dated 22-04-2009. Get it at http://jeanrapidshare.blogspot.com/2009/04/eset-offline-cumulative-update-4027.html
The definitions will update <b>NOD32 & ESET Smart Security 3.0.x / 4.0.x - (32 & 64-bit)</b>