Steve from OnTimeZone.com has created an excellent way for users to get time zone lines on their Streets & Trips maps. There are actually several ways to use this data in Streets and Trips, each with advantages and
disadvantages. The details can be found on his site.
Version 1.06 was released this week so head over to OnTimeZone.com and download the data in format of your choice.
Steve has worked tirelessly on collecting this data and keeping it up-to-date. He gives it away for free but if you are able to make a small donation he would really appreciate it.