Hello and thanks in advance for your help.  Here's what I've done so far. 

I've created a 'splash page' with images (US flag, Canadian Flag - English and Canadian Flag -French) that each have links to specific webpages ie.  US flag = www.mydomainname.com/en_us/welcome.

I've created a seperate template for the splash page, an english template for canadian english and US and a french template for the canadian french site.

I created only one rule for the template switching and included currency changes too.  Here's what the php code looks like in the advanced box :

if ($core_genius->check("uri equals http://www.mydomainname.com/")) return "mytemplate_splash";

if ($core_genius->check("uri equals http://www.mydomainname.com/en/welcome")) return "mytemplate_english_canada" and JRequest::setVar("product_currency","CAD");

if ($core_genius->check("uri equals http://www.mydomainname.com/en_us/welcome")) return "mytemplate_english_US" and JRequest::setVar("product_currency","USD");

if ($core_genius->check("uri equals http://www.mydomainname.com/fr/accueil")) return "mytemplate_french" and JRequest::setVar("product_currency","CAD");


The currency part works great, but the canadian - french and canadian english sites are not switching to the proper template. 

I've tried putting each one of these rules in a separate rule with the splash one as the first, but it doesn't make any difference.

Any idea as to what may be the problem?

Thanks and have a great day.