Ok, now we know what to do. I suggest to try explorer first - if it's going to work fine, there should be no problem with adding menu, or semething like that.
One more question - quite important. The file, that we are using (nngstart.exe) is starting automatically after powering on device, or it's launched by some screen (or hardware) button? That's important, because if the unlock script is not going to work fine from the start (sometimes some improvements are necessary), the device might be unusable till next soft reset. So if it's automatic, we have to be careful, if it's manual launch, there is nothing to worry about.