Featured Image Upload, but same name problem?

So basically I’m trying to import products, but the featured images all have the same name (but their different images), so what happens is the import keeps overriding the last uploaded image.

So is there anyway if the image is the same name, to change the image name when uploading?
Can you implement this, or is there a seperate plugin to do this?

See what I mean here:
http://www.neopointsdeals.com/neopets/buy-unconverted-neopets/

http://ww.wp.xz.cn/plugins/woocommerce-csvimport/