when you get a game with an .sfv file how do you rebuild it?

i got a game in a bunch of rar files then an .sfv file
how do i put it back together?

 

an .sfv file merely checks the integrity of the file... you use it with a sfv file checker to make sure the data is not corrupted,I heard this one is pretty good:

http://www.freedownloadmanager.org/downloads/sfv_file_checker_info/

If you do not want to trouble yourself doing that,simply delete the .sfv file if not then you should try running a sfv file checker.