Dien's toolkit should be hanging on the wall in every ERP lab. Maybe not 'intuitive' at first, sure, but nevertheless a very useful package of data processing routines. There are still some bugs being worked out, but if you are willing to get your hands dirty, an open source solution like this can be very powerful. It's saving our lab hundreds of hours we would otherwise have spent preprocessing our data by hand due to the inflexibility of proprietary tools.