And by the way this isnt the help section its the tutorial section, and why dont you try playing the game for real....
Anyway..

Get Three Kills
Open NitePR
Press "R" once until you're at [searcher]
Under Value.Dec, search 0000000003
Get two more kills And Change the thre to 5 so it looks like 0000000005 and search again.
Continue until you have 1 address left, don't suicide... And if you don't realize, you're searching the number of kills you have so you can modify it. If you have more than one adress, get another kill then search 0000000006 and so on.
When you finaly get down to one, add the final address as a new cheat, and change the 0000000006 or whatever you have it at to 0000065000 or whatever amount of kills it is you need for T3...
Turn the cheat on, and have fun...

If you can't do it after this, then no offense but I don't thnk anyone can help you, that's as simple as it can be...