Modify the upload folder

All the product i upload has them pictures stored in the folder media\com_hikashop\upload.

I have installed a plugin that show on every category page a image slideshow of the specific products contained in a folder.
I my case all my files from all the categories are in the same folder so here comes my question:

How can i store my uploads in more folders that one?
for example:
media\com_hikashop\upload\inele
media\com_hikashop\upload\bratari
media\com_hikashop\upload\cercei

i can use config > files upload folder but can it be done in product page?

i could use the specify file location after i uploaded the files where i wanted them but is complicated for other people how will use this site to do this things, is not as simple as upload from computer (witch is a very common thing)

That's actually what I would have recommended. Upload all the files in folders the way you want via FTP and then use the image gallery system to select the images you want for each product.