In B-737NG, we define ETP using Lat/Long, and then put it in FIX page. This way, it shows along your route of flight merely as an advisory.
I believe the B737NG use a Smith FMS in lieu of a Honeywell product, so yes...maybe that system will allow a lat/long insertion directly on to the Fix page but the PIP or Pegasus on the 757/767 or 777 FMS will not allow this on the Fix page.
You would think that Honeywell would have a fairly standard product accross all lines but there is a world of difference in the various applications