At current, the only mandatory portion is that the formatting will be off if you don't include a value for t or w (use Templat:bo-wo to include only the Tibetan Pinyin). Also note that "c" is currently non-functional because of formatting problems. Just include the conventional spelling as part of the value for "t", separated from the Tibetan spelling by a comma.
By default, the [[Tibetan]] link is directed to Tibetan script. If you would like it to point to Tibetan language instead (which is appropriate if you are including a conventional spelling or anything else other than Tibetan script), set lang to "yes" or "1".
