If you're getting an error that one should be installed to install the other, something is not functioning right. It may not be the right language pack. There are different ones for the UK and the US, both English, so when you download, you have to install the correct one. Also, if you're going from the original game to 1.4, that's a different language pack than if you're going from, say, 1.3 to 1.4. If you use the link I posted, it lists all the different ones, including that from the original game to 1.4. If you're trying the install after you've already previously tried it, it will not work. You get one shot. So once you've tried it once and it doesn't work, you have to remove all patch attempts and the original game, delete the registry keys, and start over. If you're not doing this, it's not going to work.