how to copy database sql server and build database at other computer

hey
now i write some program ,i use sql server 2005 express
now i want to install my program at other computer but i don't know how to do about my database

i don't write new database the same my database at other computer
please tell me , how to do?

You can just put the database at a single computer and be accessed at other computers, you just have to allow remote connections and perhaps modify your connectionstring to point into that computer where the database is residing.

EDIT:
The info here should be handy.