For those of you out there who spent their time downloading the highly anticipated iOS 4 yesterday, only to find no wallpaper or multi-tasking support for your 3G device fear not! Below is an easy solution to enable all the features of the new OS on your aging device. Please note: This solution will jailbreak your device, I take no responsibility if you you brick your device, so please complete with caution.
Step 1) Download the iOS 4 update from iTunes and install it to your iPhone 3G/iPod Touch device.
Step 2) Copy the IPSW file to your desktop. This file will be located in username\library\iTunes\iPhone Software Updates (For Example: Hellerphant\library\iTunes\iPhone Software Updates\iPhone1,2_4.0.IPSW)
Step 3) Download redsn0w jailbreak app here.
Step 4) Follow the instructions, tick “enable multi-tasking” and “enable wallpapers” and you are set once the app does it’s thing.
This is a solution for mac users, sorry those of you on Windows machines, you’ll have to find your own way.