Exactly that is what I did lot of times with my sparc stations already. But last week, the UltraBook IIi showed for the first time inconsistent NVRAM and following that, I replaced the NVRAM by one with an external battery but in my sillyness I had not saved the contens as I was not aware of the consequences :-(
So teh main reason for my post is to make other owners aware and getting hand on the contens of a matching NVRAM!!!