I just got my iPod Touch (or as some call it iTouch) back from my friend who was so nice and put the 1.1.3 Firmware on it, which I really like. What I didn’t like was that the installer no longer works or at least it only works sporadically. This seems to be a problem with some scripting bindings missing in the installer and therefore returning the infamous “Error in Script command 1: InstallApp” Message. It took me quite some time to find a fix for this and it’s working again so I decided to share it with all the people who ran into the same issues:

1. Install BossTool to free up space. Just tell it to move the Fonts and Ringtones and you shoudl have enough free space for a lot more applications.
2. Reinstall Installer.app. As I said the Installer.app is somehow corrupted while jailbreaking and needs to be re-installed:
3. Open Installer.app
4. Go to Uninstall
5. Select Installer.app
6. Choose Reinstall in the upper right corner
7. Exit the Installer.app by pressing Home

Restart the iTouch or go back to Installer.app and kill it by holding the Home button until the Springboard comes back.

That’s it

After starting the Installer.app again you should be able to install all the applications that gave errors previously like MobileScrobbler, Funambol, iShare, …