Nice article, but I fail to see the point. How are you not impacting the server? You have almost 8GB of email that needs to be backed up and virus scanned daily. No PST?....what happens if your boss comes to you one day and tells you that it is your last day. You'll have to find time (if allowed) to pull all that email down so you have it for future reference.
Here is what I do. Every year gets a .PST file and once a week I move the Inbox and Sent items into the current .PST file. Then I use X1 search engine to locate any email that I am looking for. Then I use Remote Desktop/Terminal Services and/or port 80 remote control software like logmein.com to share amongst computers.