We currently have a known issue with the RSAT tools (http://www.microsoft.com/downloads/en/details.aspx?FamilyID=7d2f6ad7-656b-4313-a005-4e344e43997d&displaylang=en) for Windows 7 SP1 installations. You will get an error when you attempt to install the tools on integrated SP1 clean installs. The error is: "The update does not apply to your system". We know about the issue and will be re-releasing the tools in April for SP1 installations.
In the meantime, a workaround for this issue is to do the following:
NOTE: If you want to attempt to install the RSAT tools on an already existing installation of SP1, see the comments below for some suggestions. From what I can tell people are having mixed results. However, I will say this. If you are going to attempt to workaround the RSAT tools issue by attempting the methods below, please make note of the machines that you do it to. There is a chance that the methods used might break the actual installation of the post SP1 released RSAT tools once they become available in April.