Shoutbox

hi guys im new here, this seems a very nice script plugin for Messenger Plus, but i've got a few questions, sry if im askn noob stuff or w/e but there's no help or readme file that comes with the plugin so......

1. In the Type field, there're the fragment, word, sentence and RegEXP options. Can someone explain what they're for? And possibly with examples, especially about the RegEXP?

2. What does the 'Match X amount of times' mean? An example?

3. Lastly, what does the first word, last word and any word do and randomize if multiple answers?

Edit:

can someone also explain the preset commands? Like what they can do and what those symbols mean? I.E:

!ping ---> ^!ping$
!say ---> ^!say ([^/].+)$
!shoot ---> ^!shoot$
!subnick ---> ^!subnick (.+)$

I don't understand why there're the symbols ^, $ and the brackets and + signs etc.........what do they represent? Are they shortcuts or part of the equation/formula?