Found it in NFPA 13.7.7.14.2 thru.....14.7 WOW!! and I thought the electrical code could be confusing. What numbers:)
Anyway according to how I read it I can put a hard wired smoke detector in the new bedroom just inside one of the entrances, and a battery smoke detector in the existing part outside the bedroom, though if possible, I may run wire to the existing part if it is accessible. The carbon monoxide detector is right outside the sleeping area, which in my case it looks like I can use a smoke/carbon monoxide combo to meet this requirement. Thanks again...