You can be as far away from your computer as you want. That is, as long as you have WiFi and a Gmail account set up with Splashtop. I'm not sure if you can do this with a 3G or 4G network.
You can do this from your computer without jailbreaking your iTouch if you figure out were all the apps are located: C:\Users\Logan\Music\iTunes\iTunes Media\Mobile Applications
You can be as far away from your computer as you want. That is, as long as you have WiFi and a Gmail account set up with Splashtop. I'm not sure if you can do this with a 3G or 4G network.