Darstellung mit Nachkommastellen

Hi!
I got a rather stupid question (I think):

Is there ANY option that makes R display numericals not like
   
   "1e-8"

but as

   "0.00000001"	

by default ?

And I need the outcome to be really numerical, so formatC(...) which produces a 
character or something like this won't be acceptable.

Any help on this would be appreciated, thanx.

Marc