In 9 it is a non-starter as they have removed this functionality - in the last couple of releases you could only have the 'gnome' foot. The only way you are going to achieve this is to:
1. Install GnoMenu (follow instructions here:
http://www.upubuntu.com/2012/03/how-to- ... unity.html)
2. Install Cairo-Dock (open a terminal and enter
- Code:
sudo apt-get install cairo-dock
3. Reboot Zorin and on the little 'z' top right of login window, left-click it to see the Cairo-Dock DE option - once in there, you will need to configure Cairo-Dock and select - get more add-ons - get the GnoMenu addon by just dragging it down to the dock - you MUSR install GnoMenu before this will work!
4. There is a way of configuring the menu icon to point to a different item, but it is a while ago since I last did this:
http://vimeo.com/63084015 - the pear was the 'start' button from the distro videod at the time!