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)
found the solution:
1. Install and When you get the error don't click nothing.
2. search for the file "sftrans1" or "mcplug" or "sfvstwra" no quotes (because the files are unpacked now in a temp folder)
2. Copy this folder and paste on desktop. My folder name is "SonyInstall_1"
3. Now install from desktop
cheers
Georgiles