Digital BW, The Print

I have several ICCs I've created using the QTR Create-ICC tool. I'd like to print an image using Lr4 so that I can take advantage of its output sharpening. However, the ICCs refuse to show up in Lr4. They are where they are supposed to be and work fine with CS4, so I'm assuming there is  something about them Lr4 does not like. 

I have heard that Lr requires RGB-ICCs. If I created the black-only ICCs using the Create ICC-RGB tool for black only curves, will those work with Lr?

This would be somewhat difficult to do since I don't think I kept the original .txt files for the paper and ink in question, but I suppose I could do it again if this would create an ICC acceptable to Lr4.