The only difference will be at the end when the install is completed and the desktop appears.In order to keep this article short I've eliminated all the steps involved with setting up VMWare to facilitate this installation.Unlike XP and previous Windows offerings that stopped dead if you didn't have a product key, this is no longer the case with Vista.You aren't required to enter a key at this point, although there are some strongly worded cautions about the potential for data loss if you choose not to enter the key.Clicking it will allow you to 'extend' Partition 1 into the unallocated space.Unlike some partitioning programs that allow you to resize a partition in two directions (larger/smaller), the 'extend' command uses the current size of the partition as the minimum size and allows you to increase or 'extend' it to include the available unallocated space.The warning makes it clear that if you select a version you don't have a key for, you'll either have to purchase that version or reinstall Vista and select the proper version.This screen is a two step process; selecting the appropriate version and then certifying you have selected the version of Vista by using the checkbox.
As you can see from the screen capture the options in this scenario are limited.There is one 20GB hard drive available and it's all unallocated space.If your intention is to allocate the entire drive to Vista with no additional partitions for other uses, all you have to do is click on Disk 0 and then click the [ Next ] button. This is an example of how you could divide up the drive into separate partitions before continuing the installation.Once you've finished up the install location and click [ Next ] it's just a matter of waiting as Vista goes through the install motions.They are true to their word on this screen when they say the system will restart several times. I've experienced timeframes all over the spectrum from 30 minutes to over 5 hours, but for a clean install on a relatively modern system I'd be surprised if it took over an hour, and the majority of installs I've done have been in the 30 - 45 minute range.
Selecting [ No ] will take you to the screen below.