4x4x4 problem

I got what I THINK is a Yong Jun cube off eBay. It came in the mail today, and I took it apart. Now, I can't get it back together :confused: :fp :fp :fp :fp :mad: It has this weird box thing on the core and tiled pieces :confused: Any idea how I get it back together? :fp :fp

I need help making my time better... I use reduction(6 edge pairing method) followed by fridrich F2l then 3look LL. My average is about 3 mins and i think I've finished reduction at around 1:30-1:45.. the rest is all 3x3x3.. which i think i'll improve on one day.. In my reduction, my...