FS9 PMDG MD-11

Hi all!!Please, does some one know how to configure the engine smoke system in the fs9 MD-11? I'm trying to do it but I don't how to right configure it. Al smoke trails are in the same level, despite all changes I make (too high for the wing engines, and too low regardin the central engine). I have that (belo), but is incorrect.[sMOKESYSTEM]smoke.1= -99.333, -10.05, 26.833, SMOKE_JT8D smoke.2= -201.500, 15.00, 00.0, SMOKE_JT8Dsmoke.3= -99.333, -10.05, -26.833, SMOKE_JT8D Tks a lot in advance!!RegardsF