Hope your schoolwork is more accurate than your RTW research ... you say you know the rules regarding HNL and then say that you want to buy 2 extra segments DFW-HNL-DFW as part of the RTW ... isn't a rule that says only 1 segment to/from HNL is allowed sufficiently clear????? If you don't know the rules, say so, but don't change the rule to what suits you and then say that you urgently need help (to find a gullible travel agent who will break the rules and then get a huge chargeback from the airline).