If you have the correct client version then it's as easy as changing the eqhost.txt and saving it.
If you like you can right click this link:
http://www.eqemulator.net/eqhost.txt
select "Save Target As" and save it over your existing eqhost.txt.
If you don't have the correct client files we cannot assist you in any way with obtaining them. Doing so gets you and me both banned.