http://infekted.org/virus/showthread.php?t=32390
Open Ableton, run the VSTi, set up your MIDI out in the VSTi's options, then click 'Configure' in the Ableton plugin box (the one with the X/Y pad in it). Then change a value in the LFO clock divider dropdown and the parameter will display in that X/Y box. Now you can draw the curve (well, some straight lines, as Ableton Live STILL doesn't do true curves, goddammit) and change the values in your sequence whenever you please.