No. Rhino is not parametric.
However, since you will need to change them individually, look at some of the new bonus tools, such as MoveSide or the old Scale1D.
In V4, depending on how the model was constructed, there are other tools, such as Stretch, or even the new associativity of curves and surfaces, that could help.
Can you post a section of your model, or a jpg of the areas you need to change. Maybe seeing the problem will trigger a few more ideas.