CSV file does not need to be in a specific format
CSV file can have any number of columns in any order; just make sure there is a header for each column name. 

To import manufacturers

1. From Manage, go to Catalog > Manufacturers
2. From the Manufacturers page, click Import
3. Click Choose File and upload your CSV File
4. Map each column in CSV file that you would like to import to the appropriate manufacturer column or load an existing map file. Click Preview Data
5. Verify the data and click on Import

Tip: Save Map File for automatic mapping in subsequent imports 
If you will be importing manufacturers on a recurring basis from a similar formatted CSV file then be sure to click Save Map File. You can use this saved map file to automatically map the columns on subsequent imports.