@devyrae
Here is a lovely installation guide ayachan94 made for us~
If you need new download links for the game or need to download the updated version of the partial English Patch for Lamento, go to this thread; ayachan94's post, which is the 5th post from the top. There's also an installation guide for the partial English patch (how thoughtful of her!)~
Remember to click the 'THANKS' button below her post to thank her for all the hard work and time she spent uploading the game files and making those installation guide videos for us~!!
Hope this helps~
Get back to me if you have any more problems~