It would be awesome if you and a team or anyone could continue work in the DB or even in the core. And btw, Silvermoon database came out when fanatiks core came out so that was when MaNGOS first supported Burning Crusade, making it a BC database. So, why not use a modern database, and change it to have the same structure as 3462 then run these queries...
Close Outlands...
Code:
DELETE FROM `areatrigger_teleport` WHERE id=4354;
Remove spawned creatures from Outlands and all new instances...
Code:
DELETE FROM `creature` WHERE map>530;
Remove the loot, entries from creature_template, and from creature_addon from the Outlands and new instances creatures...
Code:
DELETE FROM `creature_loot_template` WHERE `entry` NOT IN (SELECT `entry` FROM `creature_template`);
DELETE FROM `creature_template` WHERE `entry` NOT IN (SELECT `id` FROM `creature`);
DELETE FROM `creature_addon` WHERE `guid` NOT IN (SELECT `guid` FROM `creature`);