I went into my Itunes on the computer. It is easier to do if you click -show browser- Look for all of the artist names that begin with the letter A- multi select them-right click on them-get info-click the info tab-under the genre box type in the letter A-then click ok.
Repeat this for all of the letters of the alphabet-use the # sign for artist that begin with numbers.
The only labels under the genre setting now will be A-Z-#. You will not see rock,country,R & B etc any more.
After you are done syncing you can view them on the pioneer unit under the genre tab from the screen. Now