Install on Vista:-

Right click on the installation file Dyno62setup.zip, select "Extract all" click browse and choose a destination folder (EG Desktop)

Goto Start..Control Panel (make sure its not in classic view)

Click in "Programs" in green

Under the heading "Programs and features" click on "Use and older program with this version of Windows"
The "Program Compatibility Wizard" now starts.
Click on Next
Click on "I want to locate the program manually"
Click Next
Click Browse
Click the "Computer" icon
Navigate to the location of the dyno Dyno6xsetup.exe destination folder on the disk.
Double click "Dyno62setup.exe"
Click Next
Click "Microsoft Windows XP SP2"
Click next
Don't click on any display settings, just click next
Click "Run program as Administrator"
Click Next
Click Next to start the install:-

In the box titled "An unidentified Program wants access to your computer" Click Allow
Click Continue
In the box "Do you wish to create icons and folders" click Yes.
In the box Install Drivers "SPA Dyno V5 USB Driver Set", click install (if required, else Cancel).
In the box "Windows cannot verify the publisher of this driver software" Click 'Install Anyway'
In the box Install Drivers "SPA Dyno V6 USB Driver Set", click install (if required, else Cancel).
In the box "Windows cannot verify the publisher of this driver software" Click 'Install Anyway'
In the box "Setup successful" click OK.
In the box "Installing of SPA Dyno6x software is now complete" read the text and click OK.
In the box "Did the program work correctly" Click 'Yes, set this program always to use these settings'
Click next
In the box "Program compatibility data" Click No
Click Next
In the box "Completing the compatibility wizard" click Finish.

If using a USB interface, plug this in and wait for Vista to finish installing the drivers.

Note: If a window title bar shows "not responding" this usually means you just need to wait longer for it to finish.