Oh... and for the original question...
Nutritionally, there is very little difference between frozen and live. Some people believe that freezing will cause certain nutrients to break down, but I am not sure how big of a difference this actually is.
There are some advantages to feeding frozen:
The rodents are pre-killed and unable to fight back.
There is no food or mess to worry about with frozen rodents.
Frozen rodents are generally cheaper than live.
You can buy frozen rodents in bulk and if they are properly vacuum sealed, they can last for a few years in your deep freezer.
All the external parasites and some of the internal parasites will be killed on frozen rodents.
Live rodents are more "work." If your snake refuses to eat, you have to provide a cage/tank for the mouse/rat. There is also the additional cost of food and substrate. Live rodents can have parasites. They can, and in many cases will, fight back and could seriously injure your snake.
I could go on... but you get the idea...
Take care
Annie B. <:3 )~~