Hello,
I'm very happy tonight since I finally finished a successfull installation on my laptop.
Note that this is not on a virtual machine and a clean installation.
In fact, the CTP 6 (February CTP) set up failed with a reason that I'm familiar from CTP5 or the November CTP.
I managed to overcome this problem by changing the Regional Settings of my computer. I set them to United States and English (US) and then re-run the installation from "\servers\setup.exe"
and pointed a different target folder "C:\Program Files\Microsoft SQL Server CTP6" for installation then the default setup folder.
You can review the screenshots I have taken during the setup process of February CTP, SQL Server 2008 at photo gallery
Microsoft SQL Server 2008 CTP 6 Installation Screenshots.
Microsoft SQL Server code name "Katmai" (CTP) - 10.0.1300.13 (Intel X86)
Feb 8 2008 00:06:52
Copyright (c) 1988-2007 Microsoft Corporation
Developer Edition on Windows NT 5.1 (Build 2600: Service Pack 2)