Hi,
The easiest way to upgrade from one of the Release Candidates to the 
final release would be to just do a "yum update".
But if doing it via CD is the easiest for you, then yes, you can.  When 
you start the install, one of the earliest screens will search for all 
instances of Scientific Linux (including 4.0) and ask if you want to 
upgrade them.  You can then upgrade it.
Troy

Takashi Ichihara wrote:
>   Hi
> 
>   This is great new. Thanks to your work and all the testers.
>   By the way, is it possible to upgrade from Scientific Linux 4.0 RC2 
> (SL40.40.040505.x86_64) to Scientific Linux 4.0 using anaconda with
> iso CD ?  (Some modules will be replaced. But is this sufficient ?)
> Thanks for the information.
> 
>   Takashi Ichihara
> 
> 
>>scientific linux users,
>>
>>Scientific Linux 4.0 for x86_64 is now available.  Included here are the 
>>full SL.releasenote.  Please read it.
>>
>>I have also included the upstream vendor Release Notes.
>>
>>Thanks to all the testers who helped to make this a better release.
>>
>>Go forth and compute.
>>
>>-Connie Sieh
>>-Troy Dawson
>>
>>--------------------------------------------------------------------------
>>Scientific Linux 	4.x for x86_64     		April 2r10, 2005
>>
>>It may be possible to upgrade to this release from Scientific Linux 3.0.4 
>>x86_64 if the anaconda installer is used.  Yum is known to NOT work.
>>
>>See SL.documentation for the vendor release notes.
>>
>>See comments/issues/test reports to [log in to unmask]
>>--------------------------------------------------------------------------


-- 
__________________________________________________
Troy Dawson  [log in to unmask]  (630)840-6468
Fermilab  ComputingDivision/CSS  CSI Group
__________________________________________________