[plt-scheme] absolutely newbie question - how to run those built-in program?

Can anyone help -- how to run the built-in program e.g. the card game 
collection?

I can do my simple programming like define etc. and save in scm etc. but 
somehow I cannot find any docs on how to run the bulit-in collection.  I 
click in those .ss files and some help information about using help 
desk.  But so far help desk is some web pages served by an internal servelet.

Any help?