Jason, the problem you would have with dying a complete Roo hide, is that you will not get complete color saturation. This will mean that the edge and back of your lace is going to be the same natural color as when you started. What I have done in the past, and is very messy, is to take a small tupperware container, puch two holes in the sides across from each other. Then put a cut piece of coat hanger through the holes.
Fill the tupperware with dye to just above the coat hanger. Then you can slowly pull the cut lace throught the dye, using the coat hanger bar to hold the lace under the dye level.
As I said, this is messy, but it does work.
Ken