Just like how iMovie was hacked to run on iPhone 3GS, it was only a matter of time before someone figured out a way to install iMovie 1.2 for iPad 2 on to the first-gen iPad.
Here’s how to do it:
Step 2: Now start iPhone Configuration Utility, click on “Applications” found on the left and then open iMovie (which can be found under iTunes / Mobile Applications)
Step 3: Now connect first-gen iPad via USB cable and select your iPad listed under “Devices”.
Step 4: Now select the “Applications” tab and hit the “Install” button to install iMovie 1.2 on your iPad.