I throw some cotija cheese in with the masa, btw. You can find it in the cheese dept of your grocery store.
Now for the wrapping...
Fill a large pot with about 1 inch or so of water, put in a steamer pot and stack your tamales in. Steam for about an hour, constantly adding more water as needed. Presto. Enjoy!
P.S. This is my mom demonstrating here. Her tamale wrapping skills are far superior to mine. Hi Mom!