RGB/CMYK to Grayscale by script or right click?

A bit of thread necromancy here, sorry!

Is there a way to get the script to save the files with different names in the same directory and then update the indesign file with the new links?

Thanks!

Here is my first attempt :

#target indesign

var doc = app.activeDocument,
links = doc.links,
i, link, image;

UpdateAllOutdatedLinks();

for (i = links.length-1; i >= 0; i--) {
     link = links;
     if (link.status == LinkStatus.NORMAL) {
          image = link.parent;
          if (image.space == "RGB" || image.space == "CMYK") {
               CreateBridgeTalkMessage(link.filePath);
          }
     }
}

UpdateAllOutdatedLinks();

//===================== FUNCTIONS ===============================
function CreateBridgeTalkMessage(imagePath) {
     var bt = new BridgeTalk();
     bt.target = "photoshop";
     bt.body = ResaveInPS.toSource()+"("+imagePath.toSource()+");";
     bt.onError = function(errObj) {
          $.writeln("Error: " + errObj.body);
     }
     bt.onResult = function(resObj) {}
     bt.send(30);
}

function ResaveInPS(imagePath) {
     var psDoc;
     app.displayDialogs = DialogModes.NO;
     psDoc = app.open(new File(imagePath));
      psDoc.changeMode(ChangeMode.GRAYSCALE);
      psDoc.close(SaveOptions.SAVECHANGES);
     app.displayDialogs = DialogModes.ALL;
}

function UpdateAllOutdatedLinks() {
     var link, c;
     for (var c = doc.links.length-1; c >= 0; c--) {
          link = doc.links;
          if (link.status == LinkStatus.LINK_OUT_OF_DATE) link.update();
     }
}

Written in CS3, Windows.

This is a bit tricky.

To do it properly you need to use Photoshop.

Are they all in the same folder? You could use a batch action in Photoshop to convert them all, keeping the filenames the same (perhaps convert Folder1 to Folder2 and then rename the folders). Then update all links in InDesign.