Still confused by my headliner.

Okay, I've read a zillion tutorials and threads about replacing my bow-style headliner, and I'm totally in. But one thing is confusing me to no end. My car does not have a trim panel that goes over the edges once the headliner is installed. I do not think my car ever had this; it does not appear that anything like this was ever installed. So without that, I don't understand how my headliner will ever look finished when all is said and done. It kind of looks like the windlace is meant to be the finishing trim, but that doesn't explain what's going on at the pillar. Plus, I've read where people said to replace your windlace before you replace your headliner, which is the opposite of what it seems like you should do on mine.

Here's what I have going on:



I'd really rather not replace the windlace right now anyway. I know it's in bad shape, but it's not a priority for me at this stage if I can avoid it.

Thoughts?