Here is a sample of one cover letter that looks good - I like the structure as it matches what the company wants to what you offer:

http://jobsearch.about.com/od/coverl...mpletarget.htm

Also, I got a really good hint on resumes once - when listing skills, etc, start the sentence with a VERB, ie:

"Managed"
"Operated"
"Trained"
"Helped"
"Communicated"

etc

GOOD LUCK!!!!