How to make the Installer add packages after fresh installation

[Dean S. Messing]

I just freshly installed F8 (February respin) and during installation
I added & subtracted the packages/package groups I wanted during the
package choosing phase.  Unfortunately, some package conflict caused
the installer to barf and exit prematurely.

So I tried to install but just installed the default system.
(I.e., I took the default package choices.)

Now I'd like to go back and use the same interface to (again) choose
the packages I want and "upgrade" the system.  However the installer
just skips the "package choosing" phase when I choose "upgrade" on the
existing system.

Is there a way to get the installer to do what I want?

Dean