Hello I am wanting to run a server with this mod but wanted to adjust the resource spawn rates via the FTP file access. I don't have that the in normal UI to do this on start up.
How, where, when, why?

Thanks in advance to any of you Savvy PC folk

That has nothing to do with K2 to be honest. You can start a game in singleplayer with K2 and any other mods you want on your server and set your Map presettings there, start the game, save the game (remember the name you enter) and then go into %APPDATA%/factorio/saves.
You will find your saved game as a .zip file, upload this save via ftp to the server into the 'saves' directory and start your server with the save game.
This is either done through a webinterface provided by the server provider, or if you are using a root server, with the command line option --start-server path/to/savefile.zip

Thanks, I found another way to do it with commands and the in game map gen settings. So its all good up and running.