R indentation

I use Gnu emacs 21, Linux RH9 and R-1.7.0. I have succeeded to get the 
recommended indentation of 4 in  C  thru customization as described in 
'R-exts', p.73, but I can't get it to work in  R  code. Can someone help, 
for instance by sending me the appropriate lines in '.emacs'?

Thanks!
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