I'm getting crazy trying to install SQL Server Express Management Studio 2008 http://stackoverflow.com/questions/1583545/pb-for-installing-sql-server-express-management-studio-2008/1583669#1583669
I have tried 10 times, now I give up. But maybe I can try to work with SQL Server Management Studio 2005? Do you know if it will work?
No, as far as I know it doesn't. You will get a message that says it will work with only SQL Server 2005 or later.
No, you can use the full SQL Server 2008 Management Studio (included in SQL Server 2008 editions other than Express), and it can connect to SQL Server 2008, SQL Server 2008 Express, and any of the 2005 (and even 2000) versions, but it doesn't work the other way around, sorry.
No, you cannot use the 2005 SSMS UI against 2008. Maybe in your other thread you can show the log details that explains WHY Management Studio won't install. Many, many people are able to use this tool without issue, so maybe if you want help in figuring out why you can't, you can provide more details...