[webgroup]

for this to work, you need to use 1 DB
That 1 DB will contatin the 2(or whatever) forums, each forum with a different table prefix
So the DB will have a duplicate of each table, one for each forum.

If neither of your forums use table prefix, you must set one before, you can use the install/tableprefix.php script to change your prefixes on the vB table. Just run it from the browser.

Be sure to also make the appropriate change to config.php.

Then you will have to merge your 2 DB's into 1
Then you apply this hack.