Highlighting the gridlines of cities' "fat cross" - doable?

[Draax]

Greetings!

I've resisted and resisted, but as we all know it is futile. I've been bitten by the Mod Bug.

My idea is that when you turn the gridlines on, the fat cross of all cities is highlighted in white or heavier lines or whatever. It would make city placement a lot more intuitive, at least for me. Would probably have an effect on my strategical thinking if I could view every city's working tiles at a glance.

I code for a living, but aside from an xml tweak here and there I have never touched python or any civ mod.

Is my idea possible with what we have currently available or do I need to wait until the SDK comes out? Any and all advice is very very welcome.

And if someone already has done this or knows how to do it, more power to ya. I really just want my highlighted cross. Credit can go to whoever