Tonay, you almost there! C:/Documents and Settings/Administrator is the right one for ya but you can't the 'ApplicationData' folder because it is hidden.

Open up Windows Explorer (click 'Start', point to 'All Programs', and then click 'Windows Explorer') On the Tools menu in Windows Explorer, click Folder Options then click the View tab. Under 'Hidden files and folders', click 'Show hidden files and folders'.

Now that you can view hidden files you should be able to find the right path!

C:/Documents and Settings/Administrator/ApplicationData/Limewire/themes