Hi
First time that I post a request......
How do yuo use the fake file rar.
I understand that it is a list of fake files, but how do I use this info against the file that I am downloading ? Or even during the search process?

You don't need to do anything, this file is managed internally by eMulePlus it self.

If the fakes column is displayed in search screen, you will see the concerning info right there.

For me rar files are very important. Once I lost all of them and was really disappeared. I used a search engine, I was lucky and found an one tool, which relieved me and probably can help in other situations, for example in this too - rar fixer.