A while ago I learned how to solve a Rubik's Cube by memorizing and utilizing the algorithms on this webpage:
Recently I tried solving a friend's cube that was the same as a normal Rubik's Cube except that it had custom graphics instead of the classic colors. This was simple enough to solve, except for one thing. The center tiles on some sides were not rotated correctly after I solved it.
This cube had this configuration, with only 2 sides incorrect:
Sorry about the mspaint appearance, but it's easier to see the wrong squares here than on the real cube.
As you can see here, the center red is rotated 180 degrees and the green center is rotated 90 degrees to the right.
I was wondering, is there an algorithm that can be used to rotate one center and nothing else? Or maybe an algorithm that can rotate 2 centers and nothing else? Preferably show it in the same kind of organization as the website I provided above.