changing default gcc include path

[Chris Jones <jonesc hep phy cam ac uk>]

Hi,

I'm running FC4 and trying to setup an environment to compile applications 
that require gcc 3.2.3

I've installed the various compat rpms, which have provided the gcc 3.2.3 
compiler. This seems fine, however I am having problems with the standard 
include paths, as I get this error

In file included from /usr/include/c++/4.0.2/string:52, 
from /data/lhcbSoft/lcg/external/AIDA/3.2.1/share/src/cpp/AIDA/IAnalysisFactory.h:15, 
from /data/lhcbSoft/lcg/external/AIDA/3.2.1/share/src/cpp/AIDA/AIDA.h:4,
                 from /home/jonesc/cmtuser/GaudiPI/v0r3/dict/AFCreator.h:4:
/usr/include/c++/4.0.2/bits/basic_string.h: In member function `bool
   std::basic_string<_CharT, _Traits, _Alloc>::_M_disjunct(const _CharT*) 
const
   ':
etc. etc.

So, I am actually including header files from  /usr/include/c++/4.0.2/, 
whereas for this application, I need to use  /usr/include/c++/3.2.3/. 

I have a script which I run in a terminal to setup various things for this 
case. Is there something I can put in this script to alter the default such 
path to find files from  /usr/include/c++/3.2.3 ?

cheers Chris