[omniORB] Installing OmniOrb from a user account?

[Oliver Frick]

I have compiled OmniOrb 4.1.3 under a Mac user account and 
configured a user writable directory for the installation.
OO configures and compiles fine, but when I say make install,
it stops here:
....
install: /Library/Python/2.5/site-packages/_omniidlmodule.so.4.1: Permission denied
+ cd /Library/Python/2.5/site-packages
+ rm -f _omniidlmodule.so.4
+ ln -s _omniidlmodule.so.4.1 _omniidlmodule.so.4
ln: _omniidlmodule.so.4: Permission denied
+ rm -f _omniidlmodule.so
+ ln -s _omniidlmodule.so.4 _omniidlmodule.so
ln: _omniidlmodule.so: Permission denied
make[4]: *** [install] Error 1
....

It tries to install _omniidlmodule.so in /Library/Python/... which is
a system directory.
Does OmniOrb always need admin permissions to install? How can 
I configure a different Python site-packages directory or turn Python 
support off globally?

Oliver