Thanks for your reply TDW!
I didn't know what menu editor was, so I did a search for it and found reaper7's post -
[TEC] Adding Items in the Menu Editor Tutorial - http://www.subsim.com/radioroom/showthread.php?t=165968 - thanks to reaper7 too!
I'll give that a try.
Using the menu editor, I take it that I will be able to place things or move them to where I want them, negating the need to know anything about those numbers I mentioned, yes?
Cheers!