you could use object dock ,and have it set to autohide on the top of your screen.
just drag all the start menu items you want to it and it will do what you need the start menu to do .
when you move the mouse to the top of the screen the dock will pop out . and disappear when you move the cursor away.
it even displays the icons nicely and you can also drag folders to it
it will need a little configuring ,but its not difficult and once you have worked it out its simple. ObjectDock - Animated Dock for your Shortcuts and Widgets