configuration option for site spanning across multiple domains

I have some domains that is not actually in use and I'd like them to use the default site configuration (sites/default/settings.php) displaying some random ads only. Besides that, I'd like to be able to track traffic of each of those domains through Google Analytics. However, this module (google_analytics-6.x-2.2.tar.gz) doesn't provide the functionality as described on this Google page http://www.google.com/support/googleanalytics/bin/answer.py?answer=55503... (How do I install the tracking code if my site spans multiple domains?), which means I probably have to hack the module to meet my requirement.

I'd like to see an option to turn on/off the feature of tracking traffic across multiple domains through single Google Analytics account. Thanks.

Related code change:

pageTracker._setDomainName("none");
pageTracker._setAllowLinker(true);