nsisbi
NSISBI aims to remove the current 2GB limit found in NSIS.
...This version adds support for using a separate file for storing the install data, therefore allowing installer sizes up to a theoretical max size of 8EB (this is controlled by NSIS_CONFIG_EXTERNAL_FILE_SUPPORT, this is turned on by default).
On versions before 7069-1, the compiler (makensis) is designed to run on 64 bit machines as this is the feature needed to make installers bigger than 2GB.
On versions before 7208-1, source files added to the installer are limited to 2GB per file (this is controlled by NSIS_CONFIG_LARGE_FILE_SUPPORT, this is turned on by default).
This project is the result of several different experiments focused on relieving the 2GB limit in NSIS, so it's still a work in progress. ...