I've inherited a Zen cart system and have spent the last day or so becoming familiar with it. Suffice it to say, I'm still trying to figure things out. Hopefully someone can help me with my first "task".

I've been asked to restrict certain products from being purchased (can be hidden entirely or just not be able to purchase them) if the buyer's country is not the US. Seems like a relatively simple thing to do, but I can't find where to do this. Any help?

Paul