I reopened bug #155351 because it seems similar at what I have.
I couldn't install RC3 with boot.iso (mini-iso) because when
asking for hard drive I was asked for a net card in place of
a hard drive :-(
same with mini-iso RC2, but full RCI CD1 worked (asked for
the drive) partly (could not go more than two or thre steps
more, but found the hard drive (bur there it found RC3 and
don't like it)
so I can't install RC3 this evening - too bad.
tomorrow I will burn CD's :-((