Did you install the latest version of SimpleCV? If not I suggest you get the latest version from the repository. This library is very young, and after a quick look at the code I saw many bugs. So it's not a bad idea to go with the latest version hoping the number of bugs is reduced.
In
SimpleCV/ImageClass.py
you will find the findKeypointMatch() method. One thing you can do is to investigate why you cant call this function. If you copy here the error message you get and exactly the code you're trying to run then probably someone here can help you.
The other way is to go through the code as you wanted and see what it does and you copy the code in your script. I wouldn't recommend this.
Please let me know how it goes.