1-do i raise the temp back up to room temp -> yes, for the diacetyl rest
2-prime it then add more yeast -> additional yeast won't be necessary, lots still available
3-carb at room temp?or cold condition it -> rooms temps, then lager as long as you like
4-how long for best carbonation -> a) How Long is a Chinaman, How Ling is his sister. Sorry, wrong discussion board b) a month works for me.