[antlr-interest] The most import questions for me about antlr?

[liigo]

Hi, all
I'm a newbie of antrl!

1.
     I want to make my new language..or call it a script, such as  
python,ruby,lua,etc.
and use the new language write a "program" and "run" it.
please note, Not olny "parse" the program, but also "RUN" it!

Can antlr help me?  I do think it can help me, but I do not know How to do.
Would you like to tell me how to start? or give me a sample.


2.
     I found a lot of grammar file(*.g) at www.antlr.org, but how to use it?
If i can use the *.g to make my new language?


thanks!
liigo