Unlocking it just set your phone up to be ready for flashing to a new ROM. But just make sure you realize that these are custom versions of 6.5 on here. Windows Mobile 6.5 is NOT officially released. And as with any custom ROM there is potential to brick your phone. (meaning it becomes a really pretty paper weight). However, speaking from the experience of flashing my Touch Pro, and my brother's Diamond, as well as all of his friends Touch Diamonds. If you read the directions found
here you should be well on your way to WinMo 6.5 goodness in no time.