Using "key down" and iTunes

I’m trying to accomplish the following:

Press and hold the left or right arrow key in itunes - to make the cover flow window move left or right - not just one album at a time. I plan to use this in a Cocoa app that controls iTunes from external devices if possible.

I’m experimenting with this:

tell application "iTunes" to activate
tell application "System Events"
	key down (key code 124)
	delay 2
	key up (key code 124)
	
end tell

With the ultimate goal being to call the key down in one script and the key up in another upon press/release of a button (with appropriate safety considerations of course.)

What I get is one bump right on the cover flow and then two seconds later another bump.

Any thoughts? Anyone know of a lower-level API I can use to do this from within my App?

Thanks!