OK, here's what you need to do
First of all avoid REGEDIT or anything that fools around with the registry. That is highly likely to cause problems that are very difficult to diagnose and fix, and could even make your computer unusable under worst case conditions. What you want to do is to go to her user ID and copy all her data to yours. This is because each user ID has its own set of libraries (i.e. Documents, Pictures, Videos, Music). After you've done that, you can delete her ID via the Users applet of the Control Panel.