Cannot install Workstation Components (Management Studio,etc) (ADD_LOCAL error) MSSQL

[tweaks_sav]

I have Vista Ultimate (IIS Enabled), SQL Server 2005 Developer Edition
(downloaded and ran the SP2 Update), Visual Studio 2008. VS2008
installs no problem. When I install SQL Server 2005, I get an error
when it trys to install the last part( Workstation Components,
Management Studio, etc).
I have tried FULLY, MANUALLY removing all SQL products and registry
entries. I have used Windows Installer Cleanup Utility. I have tried
Microsoft's recommended way of manually removing SQL Server 2005.
If I manually run SqlRun_Tools.msi the error comes up right away.

The error is:
"A component that you have specified in the ADD_LOCAL property is
already
installed. To upgrade the existing component, refer to the
template.ini and
set the UPGRADE property to the name of the component."

Here's the Setup Error log: http://toby.pastebin.com/f63405e24

Any help?! Thanks!
-Toby