Next and Previous

Hi, I love this plugin, but I’d like 2 boxes to pop up, one for previous (on the left) and one for next (on the right). I’m sure there will be a few lines of code to copy and paste. Could you provide some direction? Maybe a good thing to provide this function in a new update as well.

Cheers!

http://ww.wp.xz.cn/plugins/upprev/