Basically, you can put your waypoints any which way yoU want......But PLEASE don't put Airfields down as their four letter ICAO codes.... eg EGBO DCT EGBJ DCT EGHH DCT 50N DCT EGJB. Should read...
EGBO DCT GST DCT BIA DCT 50N DCT EGJB. Or even
EGBO DCT GLOUCESTER DCT POOLE DCT 50N DCT EGJB
Hope this helps
bb