Questions for a science fiction movie getting too far out of proportion

Rating: 9/10 (5 July 2005)

I've seen people posting threads asking the same questions over and over that try to lessen the plot. Before reading any further understand that this was a science fiction based on a science fiction book over 100 years old. In a last ditch effort I am going to try and answer questions I've seen posted several times. The answers come from my imagination, you can either take them or leave them and be disappointed that every aspect of the story wasn't spelt out for you.
1. An EMP disrupts active electrical currents, hence cars with active car batteries and so forth. Empty flashlights and empty camcorders would not be affected.
2. Yes the ships were planted here millions of years ago, the aliens live millions of years because they come from a highly radiant planet and radiation is the mediator for weak genes and petty diseases that plague our species. A pure race on a pure planet doesn't take into account other planets species', kind of like collaborating with another country on software for putting a rover on the moon and forgetting to add a program to convert metric to English. And no, they didn't have to come to the planet to dig a hole for the ships, if you send something fast enough to a planets surface it's going to go a little underground.
3. The ships lost their shields because they were organic vessels that also fell victim to single celled organisms. And you can critique this answer with my first question and all I can offer as an answer is that this is a science fiction movie ending the same way as the book and people are trying to read too much into entertainment.
The movie was phenomenal, great acting, fantastic depiction of human nature, and the best special effects since Leonard Part 6.