Headliner Installation

I'm ready to get my car back on the road but my headliner won't be in for another month. My car originally came with the card board type headliner. I'm getting a replacement from Legendary that is plastic. Is there any reason i wouldn't be able to put the headliner in after I have the windshield installed? I was going to wait and get the headliner in first but now that it is going to take so long, i want to get my car on the road. Any help is appreciated.