On second thought, just go ahead with that tutorial's directions. Like I said, I have my own methods, but they can be somewhat involved. And there is no point in me wasting the time to type up my own tutorial, when you can just follow that one.
Yes, when you get to the point where XP's partition is completely gone, use Easeus to expand the Windows 7 partition back to the top of the drive. It will have to reboot in order to do so. You may wish to do a defrag afterward, as the files will likely be sitting in the middle of the partition (Defraggler
will show you this visually and do a fine job of defragging for you).