OK, I guess you know how to read your TNs since you are doing good at the other stuff....but just in case....
Option 11 ex: TN 04 0 0 10
You only use 04 10 when making a change....
LD 20
REQ CHG
TYPE 2616
TN (TN of phone you are changing)
ECHG YES
ITEM what it is that you are changing.....
(ex: if you want to change Key 0 to be x2000 and have it ring - at ITEM you would enter KEY 0 SCR 2000 and press enter; if this is the 1st phone to have this ext, it will say MARP and then CPND. To enter name for this extension put YES at CPND and enter or CHG to change the name. Enter will get you to where you can enter name. press enter and KEY will come up again in case you want to change another KEY. Press ENTER and ITEM will come up so you could change something else like NCOS, HUNT, Etc. Press ENTER one more time and you will be back at REQ and you change is complete.
I don't have an example handy that I can post but this should get you what you need for now.