Yea, but php-nuke is very insecure, I mean you may not have had any problem yet, but once you get popular and more and more people come to your site, the higher you put yourself at risk. I used to have a php-nuke site for my gaming clan, but then after a while, we got hacked and lost everything...same as others, we have witnessed. Like I said, it's totally up to you, but if I were you, I'd go the safer route and simply design your own site from scratch.
Good luck and stay safe!