Extending a partition is a completely new addition to Windows Vista. This allows the user to actually 'stretch' a partition instead of having to use third party software.
To extend a partition using the Windows Vista DVD proceed as follows:
1/ Switch on your PC
2/ Quickly insert the Vista DVD into your CD/DVD-ROM drive
3/ A message will appear asking you to 'Press any key to boot from CD/DVD
4/ Press any key
5/ A black screen will now appear with a progress bar along the bottom. The legend say's 'Windows is loading files'
6/ After the files have been loaded the Language screen will appear.
7/ Select your language from the list and press Next
8/ At the Installation screen press the Install Now button
9/ The product key window will now open
10/ Type your product key number into the available box and then press OK
11/ The End user Licence Agreement now appears. You 'must' accept this to continue
12/ The next screen to appear is 'Where do you want to install Windows'
13/ At the bottom of this window you will see an option marked Drive options (Advanced), click on this option
14/ In this Window select the partition you wish to Extend from the list available and then click the Extend option link
15/ A box will appear beneath the Extend option which you can you can use to type in the size of the extension you want the partition to have. After you have typed in the size click OK to proceed
16/ Your Partition will now be extended by the required amount