I’m using KOMA-Script (scrreprt) and its excellent set of macros to define a rich title page:
\documentclass{scrreprt}
\usepackage[showframe,pass]{geometry}
\subject{Subject}
\title{Title}
\author{Author}
\publishers{Publishers}
\begin{document}
\maketitle
\end{document}
Unfortunately, this leaves rather large vertical spaces above and below the actual content (made visible by the showframe option of the geometry package).

(Image cropped and rescaled)
This is very annoying, since now the content doesn’t align with the previous and next page. Is there a way to prevent that, i.e. stretch the title page’s content so that it touches the frame above and below?
I tried introducing a vertical space above the publishers:
\publishers{
\vspace{\stretch{10000}}
Publishers}
This does indeed produce the desired stretch, but no matter how large I set the stretch factor, a too large space still remains.
How can I change that, and still use the KOMA title page macros, without major rewrite?
What’s a “major rewrite”?!
Consider this: \maketitle in KOMA-Script produces up to six pages (half-title, title, title back, dedication …). I’m not opposed to rewrite the \maketitle macro, as long as the rewrite is along the following lines:
\edef\maketitle{
\do\some\adjustments%
\maketitle}
That is, re-use the existing \maketitle and just tweak it. I don’t want to have to produce the aforementioned six pages manually.

\maketitlecommand? – Thorsten Donig Nov 11 '10 at 21:29