This is how to fix the "Main Script Error in Installer.app You Need To be Able to jailbreak from 1.1.1, 1.1.2 , 1.1.3 using only the Dev Teams Method. The Things You Need: Your Ipod Usb Cable Both 1.1.1, 1.1.2 Restore Files (.ispw) (find them Somewhere) Both 1.1.2 Touch Free Jailbreak.bat file and 1.1.3 Dev Team jailbreak.bat File. 1. Restore back to 1.1.1 using itunes with the restore.ispw file. (assuming that you jailbreaked 1.1.1 and installed oktoprep) 2. Update to 1.1.2 (jailbreak it with touchfree Process) 3. Go into Installer and Download&install Bsd Subsytem and the New Installer Update Version 3.0b10. 4. Make Sure you set Ipod to Never Lock and Proceed to the 1.1.3 Dev Team Method Of jailbreaking. Leave the Ipod Alone and Let it Do its Thing. 5. When The 1.1.3 Jailbreak process is done , reboot your ipod and you should have 1.1.3 with installer app 6.Open installer and Try Downloading/installing new apps to make sure you did it correctly. Note. If you want to Install 1.1.3 IPHONE apps and the Wiggly Feature add this to your Source. http://oscarwu1991.googlepages.com/iphoneapps.xml or when ipodtouchmaster and Ipodtouchhackers Repo is Back Up http://madpike05.googlepages.com/repo.xml I've only added the 1.1.3.zip File Please Post if this doesnt work and i will try my best to help . These Steps are Pretty Simple to Understand to my point of view.