Error instalando SQL2005 Enterprise Edition

Necesito ayuda con la instalación de este producto El mensaje de error del
instalador es el sgte:

"There was an unexpected failure during the setup wizard. You may review the
setup logs and/or click the help button for more information."
Todos los servicios se instalan correctamente, pero al instalar las
herramietas clientes se producel el error.


SQLSetup_Core.log
Error: Action "LaunchLocalBootstrapAction" threw an exception during
execution. Error information reported during run:
"C:\Program Files\Microsoft SQL Server\90\Setup Bootstrap\setup.exe"
finished and returned: 1603
Aborting queue processing as nested installer has completed
Message pump returning: 1603


SQLSetup_Core(local).log
Running: InstallToolsAction.10 at: 2006/8/6 12:56:43
Error: Action "InstallToolsAction.10" threw an exception during execution.
Error information reported during run:
Target collection includes the local machine.
Fatal Exception caught while installing package: "10"
Error Code: 0x80070002 (2)
Windows Error Text: The system cannot find the file specified.

Source File Name: sqlchaining\sqlprereqpackagemutator.cpp
Compiler Timestamp: Tue Aug 9 01:14:20 2005
Function Name: sqls::SqlPreReqPackageMutator::modifyRequest
Source Line Number: 196