Howto change from RELEASE to STABLE

[Dinesh Nadarajah]

I am running 5.1-RELEASE and would like to update to 5.1-STABLE. How
can I go about it? I just want to install the software and not the
kernel itself. Is that possible? 

Also, where is the information for pkg_add kept? I mean when I say
'pkg_add -r bash2' how does it know where to go get it? Is there a
config file for pkg_add somewhere? I searched for it but could not find
it. 

Thanks in advance.

-D