Neal wrote on Aug 20^th, 2008 at 8:14pm:

On the DEP/ARR page, you have the option, which I highly suggest you use to install an approach. For example Flying to LAX from the east you would use CIVET5 (its now RIVVR1, but whatever), which will guide you from either TNP (Twenty Nine Palms) or HEC (Hector) to the vor CIVET. Normally the ATC will give you instructions like Descend and maintain 3000 until on glide slope expect vectors RWY25R. You will select ILS25R in the DEP/ARR page after being given these instructions. Close the route, basically if you see a line that says ROUTE DISCONTINUITY with a bunch of boxes, click on the LSK (line select key) for the vor below the discontinuity and click the LSK for the empty line. this will close the route. Check your APP REF page again. You can also get the ILS and HDG from the map in flight simulator, click on the airport you are arriving at and go from there, the only weakness is that they dont give GSIA (glide slope intercept Altitude).

Thanks alot Neal
one more stupid question. If I don't have any 3party plan builder, then I can not chose a STAR in advance of next flight, am I right? then there will be conflict between FSX off-line ATC instruction and the transition I chose in addon jet, right? then which should I follow? what should I do?  
I am a new guy at serious jetsim,so, is there any misunderstanding of ILS lead me to these question? please let me know
thanks