adding SID's en STAR's to FS9 en FSBuild

Hi everybody!I recently bought a copy of FSBuild 2.2 as to start with a more sophisticated flightplanning in FS9. Playing around a little I noticed that NAV Data are not always the same in FSBuild en FS9. As a newcomer in this field, please let me be surprised about that.... ;-)I noticed, that SID's and STAR's in FS9 are not always available in the GPS of FS9 (or v.v.). Further I noticed that some Rwy's do have ILS in FS9, but don't show up in the GPS-receiver. Quit a nuissance, if you planned to land on Rwy 22 and ATC sends you to Rwy 4, which - of course - fails in the GPS, or if the ILS/STAR in the GPS screen is no option on the ATC menu of FS9. Why is it, that often they don't match? Is there a solution for that? Can one import STAR's and SID's in FS9?If I plan a flight in FSBuild and import it to FS9, how come ATC seems to ignore anything and sends me around as they like?Can one create download SID's and STAR's and add them to FSBuild and/or FS9?Maybe some questions that cover a vast field of navigation issues, but I thank you for your replies, no matter how little (or how much) they contribute to my knowledge and that of others.William