How do I copy a calander with reccuring events?

I had to reinstall Microsoft Office. When I did so it created a new primary
calander. I found my original calandar and uploaded it (from a pst file).
How do I make it my primary calander? My thought was to copy it to my
current Primary calandar but when I try to do so it says it wont copy the
recurrent items. Another though was to find the file names and to swap name
files. I am scared to do so. i don't want to start over, and I cant find
the file names when I do a search. Please help. (Type: Folder containing
Calander items---Location: Personal Folders----When Posting to this folder,
use:IPM,Appointment)