If you're copying over a fast local network, it's easier, to just copy everything, then you don't have to do hardly any updating at all, and takes alot less time, than downloading the entire game (deleting EQHardware.Ini or something similar if it exists). If not, then the following files are what you need.
Also note, if you haven't played for a while, you may have to rename the server portion of the filenames, as most servers were merged about 6 months ago.
From the default EQ Folder copy (UI Layouts, settings, and bazaar settings):
EQ*.INI (eqclient, eqclient-user, eqlsClient, eqlsPlayerData, eqlsUIConfig),
UI_charname_server.INI,
BZR_charname_server.INI, and
charname_server.INi
Copy everything from the maps folder (In-game maps)
If you use custom UIs, then copy all the sub-folders from the uifiles folder (UI files).
If you use custom Audio Triggers, then copy all the sub-folders from the AudioTriggers folder (Audio Trigger files).
From the UserData sub-folder copy (Journal, Audio Trigger settings, AAs, and other settings):
ABILITIES_charname_server.INI
AT_set_charname_server.INI,
BART_charname_server.INI,
CJ_charname_server.HDR,
CJ_charname_server.TXT, and
GN_charname_server.TXT
As much as I can remember off-hand. There's other things you can copy as well, such as the ScreenShots folder, and Logs folder, if you wanted as well.
EDIT: Forgot BART_charname_server.INI in UserData directory.
Yther Ore.
Edited, Nov 9th 2010 6:44am by Yther