i think you have to let latex create the matrix first, then "overpaint" with tikz nodes, something like Alain Matthes' example:
http://www.texample.net/tikz/examples/m ... terminant/
(therefore use tikz matrix environment)
greez tommytex

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\setlength{\oddsidemargin}{...}
\setlength{\evensidemargin}{...}
\usepackage
not \userpackage
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