The actual bounding boxes for the waypoints changed, so there isn't a simple way to fix it without adding in the extra code, unfortunately. And even if you do add the ents, there's a few instances where things break (Luke's walk/talk script, Lando walking up to the Lady Luck, and the famous bartender scene all get broken by it, but everything else as far as I could tell seemed alright) due to the differences in the nav system.