To delete the old database if it exist:

IF  EXISTS (SELECT name FROM sys.databases WHERE name = N'MyDatabase')
    DROP DATABASE [MyDatabase]
GO

The SQL Wizard didn't create the script to create the database?

>I have created a script from an existing database (using SQL wizard). Now I want to create a new database from this script. I have 2 questions, please:
>1. If I execute this script, how do I make sure that the existing database is overwritten?
>2. How do I give a name to the new database? Or should I create a database first and then run the script?