It's the same with my Fantom XR so I switch between the waveforms using the knob on frontpannel of the synth while doing the rest within the editor software and finaly, before saving the sound, I copy the settings from the synth into the editor manually or store the sound directly from within the edit menue of the synth...
Some weeks ago I did a little sound demo to show what the postfilter Ringmod of those roland PCM synths can do. It's only one sound I tweak with the mod-wheel and channel pressure while playing...
http://musik.freepage.de/summa/PostfilterRM.mp3