Other useful tools in Adobe Flash CS4 and good use.

I am just starting to learn the proper usage of Adobe Flash CS4. I would like to ask what is the purpose of Modifier Panel? How essential it is to my Flash project? What are the attributes that I can use in line and how to properly use it? What is the difference between Paint bucket and Ink bucket tool? When it is best to use the tools? Why gap options are important in Flash project? What are the extensive uses of this tool? How can optimize these tools and also use it in different projects or application?
Thank you!
