Hi there
You can use some parameters when starting everquest2, either by it self or when using InnerSpace.
cl_username Your-Station-Account
cl_autoplay_char Your-Characters-Name
cl_autoplay_world World-Server-Name
EverQuest2.exe cl_username MyAccount;cl_autoplay_char MyCharacter;cl_autoplay_world WorldServer
If You want to activate the AutoplayWorld and AutoplayChar fields, in the eq2ui_loginscene.xml (they are hidden by default), You either need to edit it Yourself or download a modded one.
I haven'nt been able to figure out how to send the password to the client, but You can always use the EQ2AutoLogin.iss to do this for You.
I hope this of any use to You and that my english is not all to bad =)