[Regss]

Ok, I rewrite function uploading images. Try for SMB and NFS:
syncMovie

It does work over SMB. It takes almost 30 seconds to add a single movie - is it normal?

So in this case, when XBMC needs to copy all image files (poster, fanart, actor thumb) from the SMB source and create a temporary file to reduce size then send to the server it may take a time. A faster option is when the image files are stored locally and XBMC has direct access to them, then it will be a bit faster (but also any file need to be send to the server). The fastest option is when XBMC database stored only links to image in web, then are copied to movielib web script.
Another option in the new version of Movielib Addon is possible to disable sending a particular image files (poster, fanart, actor thumb.).