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 3 - Install Ubuntu

You'll need the latest desktop ISO of Ubuntu (9.04). You can choose a list of download mirrors from the Ubuntu website, or use this link from Planetmirror. Download the ISO and burn it to CD to create bootable Ubuntu CD.
Boot the Vista machine from the CD and select "Install Ubuntu".

Once the Live CD has loaded, on the Welcome screen choose your language and select Forward.

On the "Where are you" (timezone) page, select your location and then Forward.

On the next screen, choose the appropriate keyboard layout and then Forward.

Ubuntu will then load the disk partitioner to determine where it's going to be installed. Choose "Manual - use the largest continuous free space". This will automatically select the unpartitioned space we created earlier using the Shrink tool. Click Forward.

On the "Who are you?" screen, enter your username and password details, then click Forward.

On the Migrate Documents and Settings screen, if Ubuntu finds any user accounts to migrate, feel free to import it from Vista to Ubuntu. If it doesn't find any, obviously this isn't an option. Click Forward.
On the "Ready to install" screen, you'll see that Ubuntu now has enough information to commence the installation. In the summary under Migrate Assistant, it should say "Windows Vista/Longhorn (loader)". This means that regardless of whether Ubuntu found any user account to migrate, it certainly knows that Windows Vista is installed on the other partition and is aware of it. Click Install.

See the install through and then let it boot into Ubuntu.
When the install is complete the system will reboot. When the GRUB boot menu is displayed, have a look at the last entry in the list.

After the Ubuntu boot options, there will be an entry "Other operating systems" and beneath that "Windows Vista/Longhorn loader". By default Ubuntu will load itself after 10 seconds, but you can select the Vista option and Vista will boot normally.