Here is my paged terrain system, which also supports height editing and texture splatting :
http://filebeam.com/0568a038d8d9d9e733339108e37f6747
Do whatever you like with, you will have to edit it to get it working with your project, since I used functions that are specific to my engine like AegaPhysic, AegaGraphic, CException...
My approach of the problem was just a test, it's way too slow, the use of the CPU to do something like that is just silly but you can use it to understand the concept...
Cheers