how to start R64 from M-x R...

Hi there,

May be this question has been answered before, but how to start the 64 
bit version inside ESS? I have successfully used
C-u M-x R then "--arch=x86_64" <RT>, but remembering "--arch=x86_64" is 
a nuisance (for me...).
Defining on Unix >  alias R64 'R --arch=x86_64 &' works only from the 
terminal, so obviously this is an ESS thing (with elisp?) which I am not 
versed in.

Thanks for help

Christian

Christian W. Hoffmann,
Rigiblickstrasse 15 b, CH-8915Hausen am Albis, Switzerland,
Tel +41-44-7640853, c-w.hoffmann at sunrise.ch
www.wsl.ch/personal_homepages/hoffmann/