Thanks to Jason for this:

Mobile Net Switch enables you to use your computer on more then one network with the click of a button. The program allows you to automatically select the correct drive mappings, printer settings, IP settings and more. All changes are made instantly, no reboot is required.

What's New:
- Added support for switching the system Time Zone
- Added an online Check for Updates
- Added support for the Internet Connection Firewall
- Improved the user interface

Screenshot: Mobile Net Switch

Download: Mobile Net Switch 2.1

View: Homepage