How to install?
1. You need to download the version which you would like to play. There is separated downloads, one for 1.0004 and one for 1.0005, there is no feature differences, only the patch compatibility the reason. I decided to release 2 versions, so you don't need to install any patches, just the whole pack.
1. You must delete everything from the previous versions, and install a clean Oblivion Lost 2.1 without any side-mods!
2. You should edit the fsgame.ltx and at the gamedata line change both variables to true (one of them is already true)
3. Copy the content of the package to your Stalker gamedir (if you don't have a gamedata folder, don't worry, this mod will create it)
4. Read this info!
5. You can reload clean install OL2.0 savegames, but might more interesting to start a new game.
Copied and pasted from Filefront forums.
*EDIT*
Checked video, had swearing in it. So removed link, if you go to youtube though there are videos that tell you how to install it.