I answered this question via PM, but here it is for anyone else that might have this question:
Quote:
Deleting a database is fairly simple. Just follow these steps:
1. Go to Start-->Programs-->PostgreSQL 8.x-->pgAdmin III
2. Double-click the server in the left-hand pane. Your server will probably have "(localhost:5432)" in the name.
3. Enter your password
4. Click the "+" next to Databases
5. Right-click the database that you want to delete and select "Delete/Drop"
It should be safe to delete any database except for the "postgres" database.
-red