🚀 go-pugleaf

Pearl Teeth, Im at home at the moment on a Leopard Mac so Im unable to test. But I can tell you that you "file/folder expected" error is due to the way in which you are referencing your target objects. You are talking to layer of layer of document of document.
This is off the top of my head but here goes�

tell application "Adobe Photoshop CS2" -- Target Photoshop Application Object
	activate -- Tell application object what to do
	tell document "scripttry.psd" -- Next Target Document Object
		resize canvas width (10 as pixels) anchor position middle left -- Tell document object what to do
		repeat with i from 2 to 10 -- Start loop
			tell layer i -- Next Target Layer Object
				translate delta x (i - 1) as pixels -- Tell layer object what to do
			end tell -- Target Layer Object
		end repeat -- End loop
	end tell -- Target Document Object
end tell -- Target Photoshop Application Object