I use a program called UnCodex to output a .tags file that is made after scanning my UnrealScript and was wondering how would I go about using it in SublimeText 2.
Have you tried SublimeCTags?
sorry but i have no clue how to make sublimectags ref the file i have.
From the readme on that page:
Make sure the file is just "tags" and not ".tags", and place it in your project path. Everything should work automatically.