If you try to install the latest TweakUI (version 2.10.0.0) on a system WITHOUT SP1 you get that exact error message.
I think you can get the older version (version 2.00.1.0) here http://www.webattack.com/download/dltweakuixp.shtml and it works without or with the SP.
When Trying to install Tweak UI I get the following Error: "GetDllDirectoryW could not be located in the dynamic link library KERNEL32.Dll". This error occurs whether you try an instll from my saved downloads, or a new download directly from the net. Any assist will be greatly appreciated
Richard

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