MediaStream MOD - VideoClips and Karaoke on "Home"

[FragMenthor]

Hi, guys!
First of all, congratulations for this skin, I shall never go back to Project Mayhem

I am trying to make a modification of the Home.xml to include 2 new items:
"Sing" / "Karaoke" - which links directly to a souce i defined on my musicroot (file mode)
"Play" / "Videoclips" - Which goes directly to the root of the musicvideos library.

I already managed that (sort of) - it works...

Just added:

  <!-- Main Menu -->
      <control type="wraplist" id="300">
...
          <item id="11">
            <description>VideoClips</description>
            <label> $LOCALIZE[20389] </label> // Videoclips
            <label2> $LOCALIZE[31011] </label2> // PLAY
            <onclick>XBMC.ActivateWindow(MyVideoLibrary,musicvideos,return)</onclick>
          </item>
          <item id="12">
            <description>Karaoke</description>
            <label> $LOCALIZE[13327] </label> // KARAOKE
            <label2>Sing</label2>
            <!-- <visible>!Skin.HasSetting(HideMusic)</visible> -->
            <onclick>XBMC.ActivateWindow(musicfiles,Karaoke)</onclick>
          </item>
...
        </content>
      </control>

It's what I wanted, but I need help in changing the background for each of those items - it is just a little bit too confusin to me.
Also, I would like to add sub-menus to the videoclips section, just like you have for movies: "Explore"; "By Artist", "By Year", etc...
And more... (if you got to ask, why not asking for it all?? ), I would like to add a sub-menu item to the "Movies" and "Music" (and possibly others)- "Update Library".

Is it too dificult? Is there a tutorial?
Help, please!

THANKS in advance,
FragMenthor.