I'm so happy this came up.
Last week I sent an email to AJ asking help with editing/creating .ins files. still waiting for a reply. the SD1 can load 128 ins sounds , but only 8 msp. I already have 8 msp loaded on start up (actually 7, I think my drums msp with 31 samples counts as 2 normal msp) and I need at least 2 more instruments loaded in ram. I read there's a way to load even more sounds in flash. somebody have more info?