I have the EQClassic source code and I did fix several bugs that would not allow me to run the program. However, the link between minilogin and the world server seems to not be 100% linked. If anyone knows how to get this working, or more about packets you can find the source and more information on my website.
http://newagesoldier.com/everquest-classic-source-code-eqclassic-org/
http://newagesoldier.com/everquest-classic-source-code-eqclassic-org/