Hi,
I am sorry for the late reply, I was not allowed to reply to more than 2 posts here I dont know why.
So i just followed the manual. In the product import for the column name images I used the URL as I have mentioned in the previous post.
I also saved these images on my machine manually in a folder called image_used(I created this folder inside the httpdocs folder of prestashop on my local machine)
I hope this helps.