[graphviz-interest] dot2texi cannot handle large graphs

I'm trying to create a graph like the one shown at  
http://people.ds.cam.ac.uk/mg262/radius2.pdf . That's generated from 
http://people.ds.cam.ac.uk/mg262/radius2.tex using dot2texi (under 
MiKTeX on WinXP).  However, when I try to make the graph any larger, as 
in http://people.ds.cam.ac.uk/mg262/rewritegraph.tex, the tex file won't 
compile. (No error message; pdflatex just freezes up.)

dot2texi  created a file called rewritegraph-dot2tex-fig1.dot which 
seemed to contain just hte graph; I opened it up and added '$'s to the 
labels to create http://people.ds.cam.ac.uk/mg262/test.dot . 'dot2tex 
test.dot --autosize' works, but running pdflatex on the resultant  file 
(http://people.ds.cam.ac.uk/mg262/test.tex) creates an error:

! Dimension too large.
<to be read again>
                    \relax
l.28   \draw [->] (36290bp,71.966bp)
                                      .. controls (36252bp,61.909bp) and 
(362...

?

Googling suggests that it's very hard to get TeX to deal with dimensions 
this large. But I feel like there must be some workaround to make 
dot2texi Graphviz scale down all the numbers, including the font 
sizes... I'd be very grateful for any advice.

M.
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