R help - Apr 2011 - Color Key in RColorBrewer

Hello,

I am using RcolorBrewer for plotting "similarity scores", starting
with
pair-wise similarity matrix as input. "similarity scores" range is 0
to1,
with 1 meaning 100% similar (see two maps below)
http://r.789695.n4.nabble.com/file/n3455953/lingosimilarity.jpg 
http://r.789695.n4.nabble.com/file/n3455953/bingosimilarity.jpg 
I would like to have same color key in both the plots. My objective here is
to compare two plots visually. By "same color key", I mean, same range
-
like white for 0 - 0.2, grey for 0.2 - 0.4 and black for 0.8 - 1. Is it
possible to make color scale constant in RColorBrewer? If so, please provide
me pointers to command !

Thanks in Advance
Chakri

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Jsut a quick note - I found answer to my query. color scale can be retained
by break command
> breaks=seq(0,1,0.025)
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