Pass Apache location as a parameter to windows installer

Hi all,

Is there a way to pass in the directory location of Apache to the
windows installer as a parameter ?  We're using the mod_python windows
installer from within an NSIS installer and we'd like to make a silent
(or just-look-it-gets-installed) mod_python install.  Also, that would
minimize the chance of a user accidentally pointing the installer to the
wrong Apache directory.

TIA,

Yves Moisan