Hi Larry,
Only Admins can change usernames so drop me a PM with the name you wish to use and I1ll do it for you and email when done (make sure not to trash email accounts from "sketchucation").
I would love to see Mental Ray for SketchUp. It would be possible if someone wrote a exporter from SketchUp to a .mi file. Then you could render with MR standalone or the compatible new almost interactive Holomatix Rendition.