How to add additional images in admin?

Hi, I got my programmer to build my website for me via oscommerce.

But right now I am trying to build another site on my own via zencart. I have seen the tutorial for adding additional images, however it is very manual way.

Is there a way I can do it like the one below which my programmer did for me for my other website via oscommerce.

You might look at Image Handler 2. I have not used it, but I understand that it allows associating images with a product without renaming the images. In a way, it is more manual than the stock method because it requires you to enter every filename in a page, whereas the stock method requires nothing more than naming the additional images and uploading them by FTP (this can be done in bulk).