1. As long as each client connects from a different IP address it should work.
2. There is a column in the items table named idfile this field holds the item graphic information. The information in that field will look like IT10000 or something similar. All you have to do is change the number portion to the desired graphic id. You can download a media viewer and other tools from
http://www.georgestools.eqemulator.net/
3. The quest scripts are stored in your %Emulator\quest\<zoneshortname> directory. The zoneshortname for every zone can be acquired from the zone table of the database. The names of the quest scripts either need to be the npc name or npc id number.
4. The quest scripts are initially loaded when the emulator is launched so you don’t have to activate anything. The scripts can also be forcibly reloaded from with the game using the GM command #reloadquest should you need to makes quest changes on the fly.
5. The max level can be controlled in the rule_values table of the database. The following sql statements will set it for you. This will set max level to 85 and max level via experience to 85.
update rule_values set rule_value = 85 where rule_name = 'Character:MaxLevel';
update rule_values set rule_value = 85 where rule_name = 'Character:MaxExpLevel';