Flight plan newbie

Hello all.Hoping I can get some help/advice here!I have been simming for nearly a year, and have recently started using two aircraft which model the FMC.The Dash 8-300 and the PMDG 737 NG 600/700 series.I presume that I am correct in thinking that the routes generated by the Microsoft flight simulator 2004 are a bit simplistic for direct programming into FMC?I.E. Route generated from Dublin - Glasgow.EIDW MULLA RINGA BLACA GIRVA EGPF.If I load this into the Dash it seems ok, but the 737 is obviously much more sophisticated - and this route does not have things like airways and smaller waypoints.If the larger waypoints are loaded should the FMC fill in some of the gaps?I can work the tutorial routes no problems.Is there somewhere I can access British routes about one hour duration?Thanks for any help!!Cheers,