Howdy! I'm still working on mods, but I can tell you this much. The upper grille can be closed completely without any harm to engine temps. I need to get flat wheel covers made, but my time is limited by a lot of things to do and a long commute preventing me from doing them.
You have an '01, so that's before they got CVVT - That'll change things a little bit. Warning - do NOT EVER do any engine off coasting with a Hyundai auto! You'll kill it faster than huffing prussic acid.
I have partial templates for belly pan, but it's stonking COLD here in PA, so I'm hiding in the house and playing video games and working on PCs in my basement. Once it gets warmer for sure I'm going to get back at it.