Question 1....yes, providing you have the foresite to keep the assigned number straight between the two computers. You don't want to give more than one disc the same number, so really give your numbering convention some thought. If you transfer the files from one of the computers to an external, then can be added to the fiel where the KMA files are stored on the second, then rebuild the songs database and it should work. I've never done this exactly this way but it should work.
Question 2....Yes, according the the news page.
I hope this helps!