James Bannan03 March 2009, 8:00 PM
Here's how to install Vista and Linux (with Vista installed first). Step-by-step instructions that assume no knowledge of Linux. (Now updated for Ubuntu 9.04).
Page 2 - Get started - prepare the Vista partition

Boot into Windows Vista and go into Disk Management - right-click My Computer, Manage, Disk Management.

Right-click on the main Vista partition and select Shrink Volume - the Shrink tool will assess how much space can be freed up. /p>
As a rule of thumb Shrink will reduce the main system partition by about 50%. As long as the partition is big enough to begin with (at least 10GB) it should accommodate both operating systems.
Select Shrink and the tool will reduce the volume of the primary partition, leaving the rest of the disk free as unpartitioned space.
Once that's done, shut down the Vista machine.