Loader to reach 100% after loading several SWFs?

Question

How do I make the loader reach 100% when all a.swf, b.swfs, c.wfs and d.swf completes loading?
prototypeLDR.addListener(prototypeLO);
var swfsLoaded:Number=0;
var prototypeLDR:MovieClipLoader = new MovieClipLoader();
var prototypeLO:Object = {}; prototypeLDR.addListener(prototypeLO);
prototypeLO.onLoadInit = function(targetMC2:MovieClip){
          swfsLoaded++;
          if(swfsLoaded==4){
                    for (i=1; i<5; i++) {
                              _root.vest_mc["mcA"+i+"_mc"]._visible=false;
          _root.loaderBar2._visible = false;
          _root.borderX2._visible = false;
          _root.loaderBack2._visible = false;
          _root.gotoAndPlay(9);
prototypeLO.onLoadStart = function(targetMC2) {
          _root.loaderBar2._visible = true;
          _root.borderX2._visible = true;
          _root.loaderBack2._visible = true;
prototypeLO.onLoadProgress = function(targetMC2, lBytes, tBytes) {
          _root.loaderBar2._width = (lBytes/tBytes)*100;
          _root.percentDisplayZ.text = "% "+Math.round((lBytes/tBytes)*100);
btn.onRelease = function() {
                     prototypeLDR.loadClip("www.web.com/myfile/a.swf,_root.main1_mc);
                    prototypeLDR.loadClip("www.web.com/myfile/b.swf,_root.main2_mc);
                    prototypeLDR.loadClip("www.web.com/myfile/c.swf,_root.main3_mc);
                    prototypeLDR.loadClip("www.web.com/myfile/d.swf,_root.main4_mc);
//do more...

Answer 1

You need a variable that is the sum of the total bytes of all your SWF and one that has the count of bytes loaded for use in instead of lBytes and Tbytes
Thanks. How do I get the total count?
One approach would be to make the bar width total change 25% for each file.
Thanks Ned. But the bar would still be _visible=false; 4 times?