Many many times I have found people in forums asking this question. "Where is the ROOT of the Memory Stick?" Sony have made life a bit harder since many people confuse the ROOT of the Memory Stick with the MP_ROOT folder.

So, here is the answer.

The Root of the Memory stick is where the PSP, MUSIC, VIDEO and MP_ROOT , etc... folders are

Basically, when you open My Computer, and then double click on the removable disk drive, your looking at the "root" of the memory stick

Hope that helps people.