To see step by step instructions with screenshots on how you decommission the last Exchange 2000/2003 server in the Exchange 2007 organization, you might also want to checkout this articles series:

http://www.msexchange.org/tutorials/Transitioning-Exchange-2000-2003-Exchange-Server-2007-Part1.html

http://www.msexchange.org/tutorials/Transitioning-Exchange-2000-2003-Exchange-Server-2007-Part2.html

http://www.msexchange.org/tutorials/Transitioning-Exchange-2000-2003-Exchange-Server-2007-Part3.html

How to: Install Exchange 2007 Management Tools for Windows Vista Look out BlackBerry, Palm is back Moving

I apparently dont have an exchange server now installed on this computer, ialso dont think i have outlook express, every time i try to send a photo or ecard it says outlook exchange server is unavailable, since i am new to this could someone please help me,,

I think that your internet options are misconfigured with your default email program.