I need some help (Mac?). I have a Ketron SD2 that I use with RealBand, and I am thinking about using an SD4 so I can play MIDI guitar on one set of sound banks and use RealBand/BIAB on the other. How do I get RealBand (and BIAB, which may be a different set up) to recognize the SD4? Do I need to delete the current PAT files? I can't remember how I set up the SD2 when I initially purchased it. Thanks.