Particle colors set for engines?

The particle colors, for the lanes and the jump-gates and guns I get, but why engines? Each engine has different colors so when you have a red engine and you charge it up, it looks weird to have something like blue instead of red particles to charge it, which makes me a little peeved that some engine doesnt have the right colors for each engine. I don't know much about coding for freelancer, but is it hard to get all of them to have the correct color engine particles or is it extremely hard, as I don't get why it has to be a fixed color for everything. Discovery didn't do the one size fits all thing so why crossfire?

I remember from the freelancer singleplayer without mod that Anubis had its own particles , as with the other ships that had colors so what makes the mod use only one particle over a diverse range?