I bought a new harddrive and decided to install Vista on it. The security has me totally baffled. The first program I tried to install was office 2003 enterprise. I installed it as myself, the administrator. I found out that only someone called the "TrustedInstaller" has the right to write to C:\Windows\System32\ files! The problem is that I have no Idea how to impersonate the TrustedInstaller. WTF?

Yeah, you cant adminstrate your own PC. MS wants you to enter your MSCE credentials before you can do anything to System32.

For legacy application installersnot detected by Vista's Installer Detection Heuristics, you should right-click the executable and select Run As Administrator. That will cause vista to elevate the process via UAC and should allow the installer to complete successfully.