Brother's Keeper question

I am using both BK 5.2 and BK 6.1.   Actually I did most of my work in
5.2 and then got 6.1.   All of my data is on one large file.  Recently
I acquired a GEDCOM file from a relative that has information that I
don't have.  We have 3-4  of the same people on our files but most of
the new file are people that I do not have.   Is there some way I can
combine these two files without having to retype all of the data from
one of them into the other?  Any help will be appreciated.