some more comments:
I use the seminar.layout from the wiki and here's my preamble:
\usepackage[dvips]{pstcol}
only for old distributions you need the option dvips.
\usepackage{semcolor}
\usepackage{semlayer}
\usepackage{semhelv}
\usepackage[dvips]{color}
this makes no sense, because pstcol loads already color
Herbert
