Trackpad Magic is a small utility that allows you to disable and enable the Apple Macbook trackpad easily. It even has the automatic mode which mimics OS X's option. Since it worked so great for me, I figured why not see if anyone else has the same issue with the giant trackpads and see if this solution works for them.

Trackpad Magic Features:
1. Runs as a tray icon, allowing you to easily determine the trackpad's status based on the icon.
2. Keyboard shortcut (CTRL-ALT-SHIFT-M) allows quickly enabling/disabling trackpad. Works in both automatic and manual modes, giving you the ability to switch on the trackpad in case something goes wrong.
3. Option for Automatic Mode to mimic OS X-detect the addition of an external mouse and automatically disable the trackpad. Removing the mouse re-enables the trackpad. Note: It takes a few seconds on my system for the automatic enable/disable to kick in. Some others say it's immediate, but YMMV.
4. The manual mode (manually enabling/disabling the trackpad) is set by default.
5. Absolutely free. No ads, no spyware crap, just a small quick and dirty solution to this problem of mine.

Requirements:
* .NET Framework

The license of this software is Freeware, you can free download and free use this system utility software.