rhysy,
This has been brought up hundreds of times...but I doubt it is on the way any time soon. How i worked it out was to go into practice mode and play a 3 or 9 hole game. Once you get to the green, you can practice putting until you sink the putt. You can practice on the actual greens...just don't sink the putt, and you will eventually reach max shots and the game will automatically move you to the next hole. No worries, practice round game stats don't count. This is how I improved, hoped I helped.
-Long