1. Extract the contents of the zip file you download from this torrent to a folder that is easy for you to find.
2. Use a program (such as Daemon Tools) to "mount" the TLJ_US_1.mdf file. Doing this is as if you had inserted CD 1.
3. During the installation, it will ask you to insert the second disk. This second disc is, as you might expect, TLJ_US_2.mdf. Mount it the same way you mounted the first file, and click "continue" on the installation and it will continue. Repeat this for all four "disks". You may have to use the task bar icon (right click) to access the daemon tools menu, as the installation screen tends to not want to minimize properly.
4. Once you've installed the game, you will notice that launching it from the installation screen or the desktop icon will fail. What you need to do at this point is go to C:\Program Files\TLJ
(If you installed to the default directory), and scroll down in that folder until you see "launcher.exe". This is the file you want to use to start the game with, not "game.exe". What I would suggest is right-clicking launcher.exe and selecting "create shortcut", then moving that shortcut to your desktop and renaming it: "The Longest Journey". Now you can enjoy the game easily right from the desktop whenever you like.
I hope this helps, thanks for seeding guys, this game is harder and harder to find.