Forum on the move

I will try to keep the questions as short as I can:

How possible and how hard is it to move an entire IF forums over to another like i.e. SMF? IF is free, so I don´t know if that can work. I don´t want to lose all posts and topics, that´s my main intention. The URL is no problem, I have somewhat of a domain.

*looks at Silverline*

You can't move away from Invisionfree.

They won't give you the data you need to move your forum, because then you could just move away easily and stop earning them money through the adverts they'd be showing on your forum.

You'll have to start anew, or stay on Invisionfree.

Failing that, you could spend as long as it takes copying and pasting every single post.

I knew it... >.< *lockage*

EDIT: What if I removed the ads by paying them the 5$ they want for that?

then you'd have no ads; they still don't want you to move away.

Ok. *locks again*