up2date how to

[redhat]

I have just changed several machines over from RH to Fedora.  The
up2date function appears to be identical.  I ran it and it showed me
quite a few packages that needed to be updated but when I selected the
updates it collected the RPMs but then hung on the installation.  I was
curious if we have to go out and get the newer up2date RPMs like on RH? 
Can anyone advise?
thanks,
DF