Database restore script

Question

How to use below script to generate restoration script. One of my friend told me that ,
This script will generate a restore script. This could be used for all customers. The server, drives, and paths would all have to be there. Just restore master...then msdb. Then run the script and save
the output. You would need to update the path to reflect the current path. Then just kick it off. If all of the drives and paths are there, it will work.
But when i execute this script, i am getting out put just like completed successfully. 
Please help me.
SET NOCOUNT ON;
DECLARE @databaseName sysname 
DECLARE @backupStartDate datetime 
DECLARE @backup_set_id_start INT 
DECLARE @backup_set_id_end INT 
DECLARE db_cursor CURSOR FOR  
select distinct database_name
FROM  msdb.dbo.backupset
WHERE database_name NOT IN ('master','model','msdb','tempdb')  
OPEN db_cursor   
FETCH NEXT FROM db_cursor INTO @databaseName   
WHILE @@FETCH_STATUS = 0   
BEGIN   
-- set database to be used 
SET @databaseName = @databaseName
SELECT @backup_set_id_start = MAX(backup_set_id)  
FROM  msdb.dbo.backupset  
WHERE database_name = @databaseName AND type = 'D' 
SELECT @backup_set_id_end = MIN(backup_set_id)  
FROM  msdb.dbo.backupset  
WHERE database_name = @databaseName AND type = 'D' 
AND backup_set_id > @backup_set_id_start 
IF @backup_set_id_end IS NULL SET @backup_set_id_end = 999999999 
SELECT 'RESTORE DATABASE ' + @databaseName + ' FROM DISK = '''  
+ mf.physical_device_name + ''' WITH REPLACE' 
FROM    msdb.dbo.backupset b, 
msdb.dbo.backupmediafamily mf 
WHERE    b.media_set_id = mf.media_set_id 
AND b.database_name = @databaseName 
AND b.backup_set_id = @backup_set_id_start 
FETCH NEXT FROM db_cursor INTO @databaseName   
END   
CLOSE db_cursor   
DEALLOCATE db_cursor

Answer 1

If you run this script it will generated restore script based on last destination from where database was restored. It will query msdb restore history and take values from there. But why do you need this instead write your custom script
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