Export Groups to Files?

You could try attached Script, You’d have to adapt it to jpg, currently it saves pdfs.

I have not tested it very extensively and only in CS4 though.

// creates pdf-copies of layersets with dialog to select layers and suffix;
// be advised: existing files of identical names will be overwritten without warnings;
// 2009, pfaffenbichler, use it at your own risk;
#target photoshop
if (app.documents.length > 0) {
////////////////////////////////////
// get document-path and -title;
	var myDocument = app.activeDocument;
	var myDocName = myDocument.name.match(/(.*)\.[^\.]+$/)[1];
	var myPath = myDocument.path;
	var theLayerSets = collectLayerSets(myDocument);
////// filter for checking if entry is numeric, thanks to xbytor //////
	numberKeystrokeFilter = function() {
	this.text = this.text.replace(",", "");
	this.text = this.text.replace(".", "");
	if (this.text.match(/[^\-\.\d]/)) {
		this.text = this.text.replace(/[^\-\.\d]/g, "");
		};
	if (this.text == "") {
		this.text = "0"
		}
	};
////////////////////////////////////
// create the dialog;	
	var dlg = new Window('dialog', "pdfs from layersets", [500,300,930,840]);	
//create list for layer-selection;
	dlg.layerRange = dlg.add('panel', [21,20,279,445], "select layersets to create pdfs of");
	dlg.layerRange.layersList = dlg.layerRange.add('listbox', [11,20,240,405], '', {multiselect: true});
	for (var q = 0; q < theLayerSets.length; q++) {
		dlg.layerRange.layersList.add ("item", theLayerSets[q].name);
		dlg.layerRange.layersList.items[q].selected = true
		};
// entry for suffix;
	dlg.suffix = dlg.add('panel', [290,20,410,85], "enter suffix");
	dlg.suffix.suffixText = dlg.suffix.add('edittext', [11,20,99,40], "", {multiline:false});
// entry for number;
	dlg.number = dlg.add('panel', [290,100,410,165], "start with #");
	dlg.number.startNumber = dlg.number.add('edittext', [11,20,45,40], "1", {multiline:false});
	dlg.number.addNumber = dlg.number.add('checkbox', [55,20,105,40], "add", {multiline:false});
	dlg.number.startNumber.onChange = numberKeystrokeFilter;
// field to add layer-name;
	dlg.layerName = dlg.add('panel', [290,180,410,270], "layer-name");
	dlg.layerName.doAddName = dlg.layerName.add('radiobutton', [11,20,120,40], "add it");
	dlg.layerName.dontAddName = dlg.layerName.add('radiobutton', [11,45,120,65], "don’t add it");
	dlg.layerName.doAddName.value = true;
// field to select target-folder;
	dlg.target = dlg.add('panel', [290,285,410,445], "target-folder");
	dlg.target.targetSel = dlg.target.add('button', [11,20,100,40], "select");
	dlg.target.targetField = dlg.target.add('statictext', [11,50,100,155], String(myPath), {multiline:true});
	dlg.target.targetSel.onClick = function () {
		var target = Folder.selectDialog("select a target folder");
		dlg.target.targetField.text = target.fsName
		};
// ok- and cancel-buttons;
	dlg.buildBtn = dlg.add('button', [220,460,410,475], 'OK', {name:'ok'});
	dlg.cancelBtn = dlg.add('button', [21,460,210,475], 'Cancel', {name:'cancel'});
	dlg.warning = dlg.add('statictext', [21,490,410,530], "be advised: existing files of the same name will be replaced without prompting", {multiline: true});
	dlg.center();
////////////////////////////////////
	var myReturn = dlg.show ();
// in case of OK;
	if (myReturn == true && dlg.layerRange.layersList.selection.length > 0) {
// get the number instead of the name;	
		var theLayerSelection = new Array;
		var theColl = dlg.layerRange.layersList.items;
		for (var p = 0; p < dlg.layerRange.layersList.items.length; p++) {
			if (dlg.layerRange.layersList.items[p].selected == true) {
				theLayerSelection = theLayerSelection.concat(p);
				}
			};
// collect the rest of the variables,
		var theSuffix = dlg.suffix.suffixText.text;
		var theNumber = Number (dlg.number.startNumber.text) - 1;
		var theLayerNameAdd = dlg.layerName.doAddName.value;
		var theDestination = dlg.target.targetField.text;
		var theNumbering = dlg.number.addNumber.value;
// pdf options	
		pdfOpts = new PDFSaveOptions() ;
		pdfOpts.embedColorProfile = true;
		pdfOpts.PDFCompatibility =  PDFCompatibility.PDF13;
		pdfOpts.downSample =  PDFResample.NONE;
		pdfOpts.vectorData = true;
		pdfOpts.alphaChannels = false;
		pdfOpts.byteOrder = ByteOrder.MACOS; 
		pdfOpts.layers = false ;
		pdfOpts.preserveEditing = false ;
		pdfOpts.convertToEightBit = true;
		pdfOpts.annotations = false;
		pdfOpts.colorConversion = false;
		pdfOpts.embedFonts = true;
		pdfOpts.embedThumbnail = true;
		pdfOpts.transparency = false;
		pdfOpts.encoding = PDFEncoding.PDFZIP ;	
		var theVisibilities = new Array;
// create the pdf-name;
		if (theSuffix.length > 0) {
			var aSuffix = "_" + theSuffix
			}
		else {
			var aSuffix = ""
			};
// create a flattened copy;
		var theCopy = myDocument.duplicate("thecopy", true);
// do the operation;
		for (var m = theLayerSelection.length - 1; m >= 0; m--) {
			app.activeDocument = myDocument;
			var theLayer = theLayerSets[theLayerSelection[m]];
			if (theNumbering == true) {
				theNumber = bufferNumberWithZeros((Number (theNumber) + 1), 2);
				theNumberString =  "_" + theNumber
				};
			else {
				theNumberString = ""
				};
// get the layername for the pdf-name;
			if (theLayerNameAdd == true) {
				var aLayerName = "_" + theLayer.name.replace("/", "_")
				}
			else {
				var aLayerName = ""
				}			
// transfer layerset over to the copy;
			theLayer.duplicate (theCopy, ElementPlacement.PLACEATBEGINNING);
			app.activeDocument = theCopy;
// hide the llast added layer;
			theCopy.layers[1].visible = false;
			theCopy.saveAs((new File(theDestination+"/"+myDocName+aSuffix+aLayerName+theNumberString+".pdf")),pdfOpts,true)
			};
		theCopy.close(SaveOptions.DONOTSAVECHANGES);
		}
	};
else {alert ("no document open")};
////////////////////////////////////
////// buffer number with zeros //////
function bufferNumberWithZeros (number, places) {
	var theNumberString = String(number);
	for (var o = 0; o < (places - String(number).length); o++) {
		theNumberString = String("0" + theNumberString)
		};
	return theNumberString
	};
////// function collect all layersets //////
function collectLayerSets (theParent) {
	if (!allLayerSets) {
		var allLayerSets = new Array} 
	else {};
	for (var m = theParent.layers.length - 1; m >= 0;m--) {
		var theLayer = theParent.layers[m];
// apply the function to layersets;
		if (theLayer.typename == "ArtLayer") {
		//	allLayerSets = allLayerSets.concat(theLayer)
			}
		else {
// this line includes the layer groups;
			allLayerSets = allLayerSets.concat(theLayer);
			allLayerSets = allLayerSets.concat(collectLayerSets(theLayer))
			}
		}
	return allLayerSets
};