FSX:SE Object control

Hi all you expert out there; :wizard:

I'm trying to get a object to appear at a specific time and place and for a few seconds...
I know how to control the effect (using a xml file) , but not the objects :banghead:
I read that using SODE it can be done. Is there another way to do this. Or SODE is the only way...

Any idea would be appreciated.