Q: Old version of iTunes assistance

I have downloaded an old version of iTunes 10.5.  I followed the insrtuctions that were sent, but I still can't get iTunes to recognize my library. 

Resolution

1. Quit iTunes.
2. Download and install                            the latest version of iTunes.
3. Use the Finder (Mac) or Windows Explorer (Windows) to go to the iTunes folder that contains the                            iTunes library files:           
   
                  Mac OS X           
   /Users/username/Music/iTunes/            
   
                  Microsoft Windows Windows XP and Windows 2000           
   \Documents and Settings\username\My Documents\My Music\iTunes\            
   
                  Microsoft Windows Windows Vista and Windows 7
   \Users\username\Music\iTunes\
4. Drag the iTunes Library file from the above location to the Desktop.
5. Open the Previous iTunes Libraries folder in the iTunes folder.
6. Locate the file named iTunes Library YYYY-MM-DD where YYYY-MM-DD is the date you upgraded iTunes (Year-Month-Day).
7. Drag this file to the iTunes folder (the enclosing folder).
8. Rename this file to iTunes Library.
9. Open iTunes.

You should now see your missing content in iTunes.

Here is the step I can't figure out. 

7.  Drag this file to the iTunes folder (the enclosing folder?)  What is the enclosing folder?

Thanks.