Finally.. have managed to create an Unbrick SD image..
here's a full dump of 4GB card, first completely cleaned, and then flashed with unbricking S-Boot.
* download this tiny
i9300.7z file.. (883kb).
* extract using 7zip.. (beware, file inside archive is 4GB big).
* use HDDRawCopy from previous post to burn i9300.img (3.72GB) to a 4gb SD.
regards..