install of fc5 while running fc4?

["David L" <idht4n@xxxxxxxxxxx>]

I have partitions reserved for two simultaneous fc releases.  That way, I 
can try a new release and revert to the old release if I have a problem with 
the new release.  For example, I have fc4 active on my computer and I can 
still boot to fc3 on an alternate partition.  I'm about to blow away the fc3 
partions and install fc5.  My question is, can I install fc5 to alternate 
partitions while I'm running (and actively using fc4)?  Or if there isn't a 
safe way to do that, is there an easy way to extract all of the RPMs into 
the root partition of what will become the fc5 root partition so I can save 
a few hours during the installation?

Thanks...

                 David

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