after you've edited your eqhost.txt you simply make a shortcut to eqgame.exe.
You got ta haves the patchme after it. This is in the target box - example. In the target box -
"C:\Program Files\EQEmu\eqgame.exe" patchme
http://www.leetninjas.com/college/ex.bmp
theres an example pic if you cant get it still.
You don't need to download anything unless you want to make your own server.