Freebsd STABLE

[Osmany Guirola Cruz]

I am using 5.2 realese and using CTM to get STABLE
In the CTM ftp I found these folders
08/07/03 12:00AM          <DIR> cvs-cur
01/04/02 12:00AM          <DIR> ports-cur
02/11/01 12:00AM          <DIR> src-2.2
08/07/03 12:00AM          <DIR> src-3
03/13/01 12:00AM          <DIR> src-4
08/07/03 12:00AM          <DIR> src-cur
I supose that to be stable I should go to src-4 and download thw files .
I have 5.2 realese. what files should I download . 
Thanks