How do you do it? I saw one video tutorial on it, but the screen was too small. Also, other than changing the view size, are there any other major changes I would have to
Xcode 4:
The Create iPad Version Using Autosizing Masks feature has been removed from Xcode 4. Right now the easiest way is to use Xcode 3 for the conversion, since the nib (.xib) file format did not change.
Xcode 3 & 4 can now be both installed on the same system by simply selecting a different folder (see installation instructions on the disk image).
Otherwise you will need to copy/paste the UI elements from the iPhone version, and re-link them to your code.