very quick questions on xp

my show desktop icon has dissappeared from the quick launch bar, how do i get it back?

also my @ key now does this " and vice versa. can someone tell me how to change it please?

 

1. Use any text editor (such as Notepad) to create a file with the following lines:

2. Save the new file as a file named Show Desktop.scf in the Windows\System or Winnt\System32 folder.
Note: Notepad may automatically append a .txt extension to the file name. Remove this extension if Notepad adds it. These steps do not work if the file is named Show Desktop.scf.txt.

3. Quit Notepad.

4. Using Windows Explorer or My Computer, right-click the Show Desktop .scf file, and then click Create Shortcut.

5. Copy the new shortcut to WINDOWS\System32\Config\Systemprofile\Application Data\Microsoft\Internet Explorer\Quick Launch

6. Rename the shortcut to Desktop.