There are many examples of compressing files in VB.Net. So many of these examples are using third party libraries which is just not neccesarry. People were saying that files and archives exceeding 4Gb couldn't be used... I hate restrictions and decided to "Stick it to Microsoft"
To get a better understanding of Zip files and their contents I set about writing my own Zip file generator from the ground up (Still using Phil Katz's Zip algorythem). Eventually I successfully built my own Zip and ZIP64 archives byte by byte.
I then looked at my work and thought, now I have a grasp of the inner workings of a Zip file (With the PKZip algorythem) let's revist the compresion name space to make sure I wasn't simply wasting my time. It turns out that all I achieved from this project was to get a very solid working knowledge of Zip files, and how to build them internally as these romours about 4Gb limits etc were totally bogus, the Compression namespace converts large files (on the fly) to Zip64 as required. So...
Here is my Compression method, wrapped up nicely in an easy to use class. It uses the .Net4.5 Compression namespace and reads\writes files directly from\to your disk. If you observe your systems performance during compression, No additional memory is used.
I hope this helps a lot of people out in the future.