How to install SQL Server 2008 R2 Profiler
if you allready have a setup of MS SQL Server 2008 R2, try to uninstall the tools only:

setup.exe /ACTION=UNINSTALL /FEATURES=TOOLS /QUIETSIMPLE


And the install it again:

setup.exe /ACTION=INSTALL /FEATURES=TOOLS /QUIETSIMPLE /IAcceptSQLServerLicenseTerms