CSV DATA INPUT/MODIFY

Description

We are currently uploading our CSV's to our site: www.kit-stop.co.uk
One of our suppliers CSV doesn't have brand name in title which we want on each one so need to input all data to CSV file.
It is also not uploading all images so need to change all images on CSV file to main image of that product so site picks up same column for same main images = all products have main image on site.