There are 2 ways to Install apps. The easiest is to use market (find the app you want to install and click install.) If you want to install an app not in the market:
- Download the apk file for an app onto your computer drive.
- At a command prompt type
adb install TheNameOfThatApkFileYouDownloaded.apk
- you're done that's all.
Note that it does not matter where you saved the apk file. You can type:
adb install c:\download\android\thatProgramThere.apk
Uninstalling an app can be found here: Uninstalling