[EtaiWix]

DEGE,

What we did (we're in the process) is simply migrate it all to a test server we created - we copied the entire forum over, including the DB and all, onto a test server that we created on our LAN.

Everything is working there just fine- so it would work well if we would follow the same procedures and wanted to migrate.

If you do not have a local server:
Say your forum is forum.domainx.com - simply create a subdomain called domainx.com/forumtest or forumtest.domainx.com and password protect it- migrate your entire forum to there, and check to see that it works (the page is password protected, so only you can see it).

Assuming it all works correctly, do the same thing that you did.. but to the new host, and you'll be fine!