The slime lighting could be added IF the aircraft has dedicated night textures (named similar to the normal texture but with _lm appended). If this is so then the night texture can be opened and resaved as a regular bitmap image, then  simply draw in the formation lights and paint them an appropriate light green, saving and converting the texture back into it's original format (dxt3 or dds or whatever it may be). If there is no dedicated night version of the texture provided then the model hasn't been mapped to include them, so making such changes won't work. The landing light needs to be coded into the model upon compiling - you could add a representation using fx_landing_fx as an additional entry in the [lights] section per the other lights, however it will only appear as a small ball of glowing white and won't actually illuminate the ground.

For general information, FS has no distinction about Left or Right landing or taxi lights.  There is only one switch for all landing lights and another for all taxi lights.

It is possible for a modeler to create independently controlled lights, but it's a fiddly process that's easily screwed up by the user, so most modelers tend to avoid the technique entirely.

In any event, once the model is compiled, there is nothing a user can do to change it...