does it work like loadsprite or do i need the change anything?
you just set the shoebox file, and if it does not find the media file on the drive, it will try to extract it from the shoebox.
If you have a /media file, it will not look into the showbox file, even if the media dir is empty. At least in windows.
The reverse is working as expected: if you remove the shoebox file and place all the media inside a media dir, it will work. At least on iphone (my game was having problems with the shoebox file in iphone. I just delete the .sbx file and copied the /media dir from my PC using ifunbox, and it worked like a charm).