You can check out the Slim Slow Slider Plugins (Half the site is japanese or something when I try to view it). But when I downloaded the plugins it came with a schematic how to use it (It involves using Quad Group Channels). The only reason I haven't upgraded from SX2 to SX3 was because they didn't include side-chaining capabilities, as they were rumoured to, so if SX4 has it, great, I'll finally upgrade, but I'm not holding my breath.