To install the ISE for PowerShell on Windows Server 2012, just as in Server 2008 R2, you can select the feature, or simply execute the following in a PowerShell command prompt:

1: Import-Module ServerManager
2: Add-Windowsfeature PowerShell-ISE

Reference: PowerShell ISE: Not Installed By Default in Windows Server 2008 R2

If you have a SQL Express 2005 installation with SQL Management Studio express installed these four commands will do a silent upgrade to 2008.

SQL Server Express

First extract the contents of the SQL Express download into a directory.

(or whatever .exe you downloaded.)

Install Windows Installer 4.5 and Windows Powershell.

Then remove SQL Tools 2005
        msiexec /quiet /Uninstall {58D379F7-62BC-4748-8237-FE071ECE797C}

Remove Management Studio
        msiexec /quiet /Uninstall {20608BFA-6068-48FE-A410-400F2A124c27}

Ugrade the SQL Engine.

Install Management Studio 2008 Express
        SETUP.EXE /QUIET /ACTION=Install /FEATURES=Tools /INSTANCENAME=SQLExpress!34211943A0184E9C!204.entry