Extract the contents of the .rar file into the game's installation location. After that, the lapis_data folder should be a subfolder within the game's folder.

Within that lapis_data folder, run the Install Biliniar Filter Begone batch file.

I extracted the .rar file and put it into the game's folder but I don't see a lapis_data folder at all?

It's in the .rar file you don't have a folder with the name of the rar file do you? If so move everything in it up to the main folder of the game. There should be a lapis_data folder in there.

No, I do have the folder with the name of the rar file but there is still no lapis_data folder when I moved the contents in into the game's main folder.

Did I download the wrong file?

Could you or someone else tell me what the rar file should have when extracted? The only thing that is missing is that lapis_data folder.

Found out my problem, the rar extractor I used didn't do it correctly. Thank you for the help.

I'm glad you figured it out. :)