I am new to Drupal and just installed Drupal 5 via CVS on my PC (Ubuntu) a couple of days ago. Now since version 6 stable is out. I want to know the following:

1. Since Drupal 6 displays in admin section any module needs that needs upgradation, is it better to install multi-site via cvs or is individual installation better?? Which method would you recommend for multi-site installation?

2. I already have D5 installed on my PC that I installed only a couple of days ago to start learning. Now I want to learn D6. How do I install D6? Is there a way to remove and re-install. BTW, I am using Ubuntu.

Thanks,

RKC