From NSIS Wiki
The [bulk data loader] is designed to make it easy to create and distribute SQL Server data archives. Bulk Loader takes advantage of the BULK INSERT statement of Microsoft's SQL Server to rapidly load large amounts of data.
If you have a large amount of data to load into your customer's server, create an archive using the bulkextract tool, then ship the .zip archive to your customer on a CD, along with the bulkloader tool. Run the bulk loader tool from the CD's autorun.inf file with the desired parameters, and your data is quickly and easily loaded into the customer's SQL Server.