Renaming module directory

Hi Team,

We are currently using:-
BuildDate Wed Mar 05 15:52:00 IST 2014
Version 4.1p
SCVersionNumber v9.1p_2014-03-05

Is there any property which we can override to change automatically generated directory name while GWT compile.
i want to change name of 'modules' directory to say 'custommodules' .

so directory structure can be sc/custommodules