How do u get smoke on other aircraft other than the extra 300s? and if so how do u get it in different colors? FSX
To my knowledge the only plane that has smoke trails is the 300S, but maybe you could find a file to download and install on the plane you want. Could be a good idea for someone to devellop such a file. As for the color, same thing would apply here.
Read this topic: https://forum.flyawaysimulation.com/forum/topic/27196/smoke-system/
This is the file you need: http://library.avsim.net/esearch.php?DLID=&Name=&FileName=demo_fx1.zip&Author=&CatID=root
Don't be put off by the fact that it's an FS2k2 file, in the example above I used fs9. Since there are no gauges involved, it should work perfectly allright in FSX.