Hello, I have the PMDG 737 NGX, PMDG 777-200LR/F, PMDG 747-400X, PMDG MD-11X and the ifly 737 NG. With the ifly 737 I can edit the flight plan files f.e. zbaa.FLTPLAN with a text editor (Notepad) And i can edit the SID STAR files. Like that I can insert conditional waypoints. This procedure is documented in the manuals of ifly: FlightPlan Introduction.pdf and Procedures Introduction.pdf excerpt: Line #17.6: It is a flag which specify whether the airplane needs to fly over this waypoint. 0: No need to fly over. 1: Need to fly over. Line #17.7: It is a flag which stands for the property of the route associated with this waypoint. 0: Track to Fix. 1: Direct to Fix. 2: Course to Fix. 3: Arc to Fix. 4: Radius to Fix. Line #17.8: Heading of waypoint in degree. If the current waypoint and previous waypoint are not the condition point, the FMC automatically calculates the heading. If value in 17.9 is “0” and value in 17.7 is “3”, it indicates the radial when finish the leg. If value in 17.9 is “0” and value in 17.7 is “4”, the universal data item 6 must be set. The prefix “L” or “R” can be added to specify the direction of turn. “L”: Turn left “R”: Turn right Line #17.9: It is a flag which indicates whether this waypoint is a conditional point. 0: It is not a conditional point. 1: It is a conditional point. Line #17.10: It is a flag which indicates whether this waypoint needs speed constraint. 0: It does not need speed constraint. 1: It need speed constraint. Is there also a description for the PMDG 737 NGX ? For .rte files. SID STAR files Can the PMDG 737 NGX do this: It is a conditional point. In the PMDG-737NGX-Tutorial-2.pdf it is written, that PMDG is the best implementation of the CDU in the FMC. Best Regards Peter Brylka