I play on my own Feed The Beast Mindcrack (V7) server and i saw guudebolderfist from youtube on his 20'th episode of ftb talk about a storage system that fascinated me and i was wondering if any one could explain a bit on how this is done. Here is a link to the video im talking about [media]http://www.youtube.com/watch?v=90p7BCJXBpY[/media] and its from 17:25 to the end of it.

I am not trying to get the code for it just want to know if some one could set me in the right direction with the cataloging thing