http://www.gofir.com/general/nat_tracks/index.htm

Is an alternate site that seems to be working better today.

I usually look at W, X, Y or Z then plot backwards to my departure airport's best transition from the SID (I generally use DAWGS4 from KATL) and then take the last NAT waypoint and look for the most reasonable route to my desination, again taking into account the STAR.

This is if I don't have a prepared route from simroutes, or just feel like doing it myself.

OCK 2F would be good, since it transitions from BEDEK.  It will take you to Ockham, not surprisingly, where you could even hold if needed / wanted.  Then you'll want the 27R arrival from Ockham.

I suppose I'll re-do the tutorial to include SIDs and STARs, but this one was mainly how to handle the kind of routes you get from simroutes., and that's the only one I found from simroutes.  At east the mechanics are correct, and (now) the resources you need.

Another way is just to use FSX's flight planner and work out your route point to point, then add those waypoints all direct.  Somewhat less elegent, but gets the job done.  I use direct GPS for this method, and try to keep my line as close as possible given the airways and NAT.  Then there is always the push a button and see what FSX gives you.  Some routes northern Atlantic routes can be pretty wacky, though.