The latest results as mentioned in 'Neuralstem Cells Induce Significant Functional Improvement In Permanent Rat Spinal Cord Injury, Cell Study Reports" does not mention the need for a scaffold. I've read that in CUR's recent ALS study, that they simply injected stem cells into the gray matter of the spinal cord to get the results they got.
I believe that NVIV is much farther along and on the cusp of human testing while CUR is years away since it it just at the stage of testing on rats. CUR looks promising, and they have other stem cell treatments for ALS and a drug for depression that has "no side effects".
I can't answer the question of weather they will be partners, but they could be competitors at some point.