Downloading non-market applications from our AndroidApps directory is simple on Android. Here’s what you do:

First, head over to the main settings of your T-Mobile G1

Then go to Applications>Unknown Sources and click OK

Visit Android Apps and download your desired application (should have a .apk extension)

Run the file and install the app

Remember: you won’t be able to view the application from Market Downloads but it will be available in your “pull-up” menu and you can add the icon to your desktop by long-pressing and selecting it in “applications”.