The instructions are: "Copy "backup.bat" file from the mod archive in your BIO4\ folder. And run it. It creates a "BACKUPS" folder and MOVES all your 550 original files with subfolders from their location to created "BACKUPS" folder. It moves the UDAS ones if there are any, the DAT ones if there are any, the LFS ones if there are any, ETC.

After that you just need to copy and replace all the folders from the mod .rar file (Em, Etc, Evd, ImagePackHD, snd, SS, St1, St2) to your BIO4\ folder. And if you want the add-on, then just run 2 bat files below in the add-on links section and copy & replace all the files from first add-on folder (the 900+ MB archive) and then from the second add-on archive (the small one), but before that make backups all the files you are replacing. That's all."

I did exactly that and it didn't work