How to use it:

1. Install the script, place the .jsx file in the Scripts folder (Photoshop CS/Presets/Scripts) and restart the application. The script appears in the Scripts menu (File > Scripts)
2. Create the graphical assets as .psb files and save them in a folder named “assets”
   The file names must start with the prefix “so_” and end with “.psb”. (the folder name and the prefix can be altered in the variables in the beginning of the code.)
3. In the psd(b) files in which you want to use these assets, create Smart Object layers that have the same names as .psb files without the extension, e.g. a layer named “so_mail_icon” links to assets/so_mail_icon.psb.
4. Run the script. The smart layers will be replaced with the .psb files.

Download Sample

var prefix = "so_";
var assetPath = "assets/"

var count = 0;
listLayersets(app.activeDocument);
listLayers(app.activeDocument);
var path;

function listLayersets(pointer) {
     for (var i = 0; i < pointer.layerSets.length; i++) {
        var layerset = pointer.layerSets[i];
        listLayers (layerset);
    }
}

function listLayers(pointer) {
    for (var i = 0; i < pointer.artLayers.length; i++) {
        var layer = pointer.artLayers[i];
        if (layer.name.indexOf(prefix) == 0) {
            if (layer.kind == "LayerKind.SMARTOBJECT") {
                app.activeDocument.activeLayer = layer;
                replaceSO (app.activeDocument.path + "/" + assetPath + layer.name + ".psb");
            }
         }
    }
}

function replaceSO (newFile) {
	var id = stringIDToTypeID( "placedLayerReplaceContents" );
    var desc = new ActionDescriptor();
    var idn = charIDToTypeID("null");
    desc3.putPath( idn, new File(newFile));
    var idp = charIDToTypeID("PgNm");
    desc3.putInteger(idp, 1);
	executeAction(id, desc, DialogModes.NO);
	return app.activeDocument.activeLayer
};

stardusts and boxes from kynd on Vimeo.

stars from kynd on Vimeo.

color stars from kynd on Vimeo.

ecdysis from kynd on Vimeo.

paper balls blowout from kynd on Vimeo.

paper planes blowout from kynd on Vimeo.

paper planes blowout (colored) from kynd on Vimeo.

embroiding flowers from kynd on Vimeo. The music is by by Delphine Dora

seasons / strings from kynd on Vimeo.

garden abstraction from kynd on Vimeo.

garden impressionism from kynd on Vimeo.

zero to nine from kynd on Vimeo.

pencil sketched black beholder from kynd on Vimeo.

pencil sketched boid fragments from kynd on Vimeo.

pencil sketched metaballs from kynd on Vimeo.

pencil sketched worms from kynd on Vimeo.

night train from kynd on Vimeo.