How can i properly move Icy, with all content.
I've tryed just to import SQL database from old to a new Icy. But all that i got was users.

I also want to move the forums to a new subfolder.

How should i go ahead and do it without messing up the files, posts and members.

If you are just moving to a new subfolder without altering domain name, all you have to do is locking your site, change settings in ACP regarding path and cookie name (just to make sure the browser will recache it). Then move all files and make sure you empty the CACHE before trying to access the new path.