http://forums.electronicarts.co.uk/battlefield-3-pc/1446055-how-install-disk-version-bf3.html
Originally Posted by roofedkiller
Here’s the simple fix to instaling bf3 YOU NEED TO BE ONLINE!
1. open orgin but make sure your game is added to library
2. insert Disk 1 then run the setup exe (NOTICE ORGIN MUST BE OPEN FOR THIS TO WORK)
3. when the popup appears click* the install box orgin will start to say Preparing then – Instaling Information – check the pause button it must say INSTALLING INFORMATION you will hear your drive reading the disk also have your second disk ready as when it hits 5GB it will ask for disk 2 (Above Where it would say normally downloading) This means it’s installing from Disk IF IT SAYS DOWNLOADING YOU DID IT WRONG!
Keep in mind! after you finish installing disk 2 the game will download a 400MB patch this is normal let it finish and your ready to go!