Moving from Outlook to Act!

We're thinking about moving completley over to Act to
reduce cost, etc - anyway, I know how to make Act read
Outlook's emails, and its pretty easy to copy the data and
put it into Act's personal folders (or create temp folders
in act to hold a copy of all my outlook email).

But the problem is the Calender - lets say we import
Outlook's activities into Act! - so far so good, what
happens when we uninstall Outlook? - Do we lose all the
activities? How do I import the activities without using a
hard link into Outlook?