How to call groovy lib classes from event handler?

1. I have lib classes in ext folder of ready api.I am able to access these classes from groovy test steps but having trouble when i try to use it events.They dont get executed at all.

2.I have groovy libraries in script library in C:\ReadyAPI-1.5.0-m-SNAPSHOT\bin\scripts.they work fine from groovy test step but dont work from events.

Question 1:

Am i missing something ?Above mentioned is all generic libraries.

Question 2:

Also,i have doubt if i can have testrunner specific statements in groovy scripting lib externally ?

Question 3:I have 2 groovies that needs to be repeated for all test cases.Initial set up and After execution(save results in db).Which approach is best and feasible ?

1.Have the entire code outside of the test cases either in events (so it will be executed before and after test case)  ?

2.Copy the groovy call to start up and teardown script of each test case ?