Does anyone know how to add tail light and the'splash' light on the side of the jt for FS98 aircraft? Also, does anyone know how to, if possible, get smoke system frm each engine. If any one can help please reply.

No seperate smoke systems like in FS2K2 are possible.

Edited: If you are talking about FS98 then forget the following because it pertains to FS2002 only:You can add lights to your aircraft, see the lights section of one of the default aircraft's aircraft.cfg file.You can add effects, such as, smoke. Look at the effects section of one of the default aircraft's aircraft.cfg file.