The American Droid may lack multitouch, but the European Droid, called the Milestone, does not. It is possible to replace your Droid’s software with the the Milestones’s. It’s a bit risky, but it’s still buggy, and still buggyGPS doesn’t work, for example. You should be fine if you follow the instructions closely, but there’s a slim chance you could brick you phone. Unless your restore your stock bootloader and software image before sending it back to Verizon, rooting the phone can void the warranty.”]
Source: https://gizmodo.com/how-to-hack-multitouch-onto-your-motorola-droid-5455452