[CentOS] Saving digikam photos for update to Centos 5

I will be installing Centos 5 soon and would like to know how to save my
digikam photos from centos 4.4 for inclusion in the centos 5 digikam version.

I have a external usb 2.0 hard drive to save the messages on. I know how to savethe messages on the hard drive. 
I am interested in knowing should I save the entire pictures directory or only
the photos from my albums.

I would greatly appreciate any help you can give me.

-- 
Richard Miles
Federal Way WA. USA
registered linux user 46097