Im forwarding it to someone else to answer, but in the mean time, another thing you can do,
is open your mindmap in Freemind and take a screenshot using the Vyew Screen Capture tool.
If the map is bigger than one screen, you can take one snap shot, then scroll over, and take another snapshot
and so on… then fit the pictures together in Vyew.
You will notice that each Vyew Page is only a certain size… but if you drag a large image slightly off
the Vyew page, the Vyew page will grow to that size the next time the page is visited
(so if you go to the NEXT page then BACK one page, you’ll see what im talking about)