You should be able to do this. On the EE-site there is a video "Adding Attachments on the enTourage eDGe" that shows how to do that.
(I cannot try this myself because my Edge is still in the USA and I am in The Netherlands. Because of the vulcano in Iceland we had to cancel the trip USA/Holland and now I have to wait till at least the end of May.)

Hope it will work,

sjarrel