I was using the script from Blueball domains (in your links to downloads for Joomla) as it was handy in excluding my site visits which the Desktop client for Mac doesn't want to do at this stage (BTW - any ideas on when we can get an update?), anyway, I uninstalled that and put in the one from Rocketwerks and it is doing fine, except counting my front end visits. :(
As a side note, I manually edited the Blueball domains script to include the new script you are pointing to and it didn't work so, not 100% sure why it didn't. Two files, the PHP and the XML (Which was for the admin side). The PHP was simply the code for the script you want us to use.
In any event, got it working now.