how does greek yogurt, soy milk and almond milk fit in with the Zone. I am having trouble finding answers on this. Any help is greatly appreciated.

You need to read the labels of each to determine how they fit. They all vary widely in carb, protein and fat content.
Carbs 9g = 1 block (total carbs minus dietary fibre equals the carb content)
Protein 7 g = 1 block
Fat 3 g = 1 block

In my experience, Greek yogurt has very high fat unless you can find a 0 fat one. Soy milk should be the unsweetened variety, as generally there is added sugar. Almond milk is generally just carbs and fat.

Greek yogurt can be almost be counted as a straight protein (like cottage cheese) even with a small amount of carb. But, it is going to depend on the brand/variety, so Xee is right--read the labels.

Careful with soymilk and almond milk. You need to choose the unsweetened varieties, or else you will end up with an unfavorable beverage. Again, they vary depending on the brand, so watch the labels.

And most Soy milk and Almond milk, etc, has a lot less protein than regular cow's milk. Our 21 year old daughter has only recently become lactose intolerant, so I've learned a little more.
Also, many experts, though divided on benefits vs. harm (breast cancer) caused by Soy products, except for fermented Soy (like Natto), so the sage advice is to not get more than 25 g (3 blocks) of protein from non-fermented soy per day.