Trying to avoid heartache by asking this question in advance.
I have a WP3.5 multisite network using WPMUDev Multi-DB, multi-domains and domain mapping plugins on a subdomain setup. I have existing subsites that are mapped.
subsite.mainsite.com = niche.com (domain mapping)
can I just install the Networks for WordPress plugin and live happily ever after? or need to prepare in advance. Do I need to deactivate the other plugins?