So, what exactly is the problem?
Are you trying to run the ENB files?
Once you download them, you need a program like 7-zip or winrar to open the .rar file. I use 7-zip, which is free. You can get it here
http://www.7-zip.org/Once you have that, you just open the .rar file with that, select everything and click extract, and extract it all to your main FeralHeart directory located in C:\FeralHeart
Hope that helps a bit. c: