Worked for me...........
1.D/L iPhone Configuration Utility
Apple - Support - iPhone - Enterprise
2.D/L IPhoto from App Store
After downloading the apps, launch iTunes and connect your iPad to Sync with it.
Now launch iPhone Configuration Utility and click on the option “Applications” on the left side.
After this click on the “Add” option at the top left corner and locate iPhoto from your Hard Drive.
Now that you have connected your iPad, you will be able to see the name of it appear just below Applications and under the hood “Devices”.
Click on the name of your iPad and search iPhoto from the list of applications that will appear on the right side.
Once you find iPhoto in the list, simply click on it and select to install. After a few moments iPhoto will be installed successfully on your First Generation iPad/iPad 1.
iPhoto when installed on your First Generation iPad/iPad 1, works fine until you connect it next time to iTunes and Sync.
The error message will pop up ” This computer is not authorized for apps installed….”.
To get rid of this headache, there is only one way. Just ignore it and select cancel option every time you see the error.
Other than this you will not face any problems.