using "firstboot" for further SW installation

[Craig Ringer]

>   at the moment, when i install, i can get an estimate of how large to make
> the /usr filesystem by selecting "Everything", even if i only plan on installing
> a subset of the packages.  doing that at least tells me how much space i might
> need later if i decide to add everything i left out.

It shouldn't be too hard to make the installer capable of telling you 
"the total size of all the packages you could install in this Red Hat 
release is ..." - even in the relnotes should be good enough.

Craig Ringer