Custom E2 functions

Hey Facepunch Peoples, recently today i discovered i had backed up my 50+ e2ā€™s in dropbox a long time ago and forgot about them. I reinstalled gmod and freaked out when i lost all of them in my local files. IT was a long time ago that i reinstalled gmod. I decided to use dropbox after about a year :stuck_out_tongue: Iā€™m so happy i have them back.

Anyways, i wanted to make a custom function for E2. Something along the lines of shipmentName() where it would get the name of the shipment that a ranger would take. Ive searched for a while and have come up empty, id really like some help on how i can do this, Thanks