Anyway, yeah, I finished playing through UBW and got the True End on my first shot, so I'm going to go back through the route and try to get the Good End this time. I took some screencaps of when Rin came into the Dojo and told Ilya how to get the Good End, so I'm using those as my guide right now.
Sorry for the late reply. Anyways whether you get the good or true end it depends on how many flags you raised with Saber. It sounds weird at first but for Good End you need to get some Saber flags too...
Perhaps by the time I say this you probably got through UBW already. If so then I wonder which ending you got.
I'm up to the point where Shirou is fighting Gilgamesh and Rin has gone into the lake to try and save Shinji from the incomplete Grail. To be honest, I'm kind of stalling a little; I'm not looking forward to Heaven's Feel, though I really want to see if I get UBW's Good End or True End.