There are many reasons why you might want or need to resize a partition, but generally speaking partitions can not be resized without damaging data. That is, until Microsoft Windows Vista. With Vista, resizing a partition that already contains data is not only possible, it's fairly simple. The only gotcha involved is that Microsoft has, with good reason, obfuscated the process from the untrained eye. Naturally I will give this warning. Although this method is tested and proven, that is not an absolute guarantee. Data can get lost when strange things occur. So with that in mind, your data is in your hands and you might want to do a data back up first. With that being said, let's get going.