[BioC] DEAL and Graphviz

[S Peri]

Hi all, 
   some vague questions about deal package and graphs.


1. How is DEAL package showing the output network
graph? Is that graphviz installed along with R is
displaying the graph or it is some inherent module of
DEAL package draws the graph. 

2. can I take the output from deal in someway and
redraw the final network graph in graphviz using DOT
(directed graphs). 

Any suggestions?
Thank you. 

Peri.