script to make right click on mouse to shift click

I would like to have some way to drag and drop multiple files easily with “only a mouse” ie no keyboard.
I have written an applescript in extra suites to make this happen.
In the mouse control panel I select the applescript app and assign it to the right click button on my magic mouse.
This is the coding

tell application "Extra Suites"
	ES click mouse
	ES shift down
end tell

I then try to touch the first file with the left mouse button then click the last file with the right button, however it just clicks the second with no multiple files selected.
Is this the right approach or is there an easier way to select multiple files and drag them to another location without having a keyboard to push the shift key?
Why is the coding not selecting the shift down?

If you’re trying to do a “shift-click” as the definition for the right mouse button, might be easier just to use a different mouse driver. Logitech’s drivers can do this for their mice, and SteerMouse, USB Overdrive, and ControllerMate can do these sorts of things for most other mice.

I use SteerMouse in order to use a left-handed Logitech MX-610 on my Mac as well as ControllerMate to further customize mouse behavior (as well as a couple of X-Keys devices). SteerMouse has a limited-time demo, and ControllerMate has a limited-module demo (and can kick-off AppleScripts)–so they might be worth trying-out before buying.