[Eikinskjaldi]

If both boards are on the same mysql server then all you have to do is prefix tables with the database name

e.g.

Select blah from database1.table1
join database2.table1
on (database1.table1.id = database2.table1.id)

If the mysql servers are on different machines then you will need to replicate the vb DB class and set the second up to talk to that machine. You cannot cross query directly in that instance, but you could use php as an intermediate

$db1stuff = select blah from db1
$db2 stuff = select blah from db2 where field in ($db1stuff)