Real Nav is very very simple. You are basically letting your crew do the work for you and they will even plot your estimated position. Using the autoscripts, it will place an estimated mark on your nav map every 2 hours. So basically you really dont do any actual "real" Nav.... you just don't see a "GPS" style moving map with your exact position. It does induce some error into the plot tho so your position is not exact....but close enough (think Nuclear blast), which is all you need. I'd try it out a bit as it at least adds something else to think about with the game.
Having said that, I've had a hell of a time with MODs and trying to "get the right order". Once you start that process of Moding the Mods after you have already Modded
.... things can get messy if you don't really know what you are doing. I ended up having to reinstall a clean game several times.