Haven't tried to enlarge cross processed C-41, though from logic and what I hear, it's difficult to get good contrast with the orange mask, as it filters our much of the light that the paper is sensitive to.

I have scanned negs. like this before, and it works fine; a little bit of Photoshop work is needed to pull them out of the orange haze, but its doable.

I believe that some of your problem may be solved if you remove the yellow mask layer from the film. I believe it is made from silver, so it may be bleached out ... not sure how to do this though ...