Doesn't seem like Sony Vegas 9.0 64bit works with Windows 7. I get the following errors.
The following components are required by this software:
Microsoft Visual C++ 2005 Redistributable
Microsoft Visual C++ 2008 SP1 Redistributable
Microsoft Visual C++ SP1 Redistributable (x64)
The following components are required by this software:
Microsoft Visual C++ 2005 Redistributable
Microsoft Visual C++ 2008 SP1 Redistributable
Microsoft Visual C++ SP1 Redistributable (x64)