these presets are extremely complex. We advice to use them as they are, unless you are a skilled Vsig programmer. In addition to this, some Virtual Racks have compression in them. This is a typical "in series" *fx* that requires the dry signal to stay in the preset..
The dry signal goes thru a long series of switches. Programming a separate dry signal path requires a total dismantle of the algorithm(s) audio path and a rebuild work.
all the best