worldmarker help

[Lazare]

Back again with a new question and thanks all for the help on my macro question.

I am trying to add world marker buttons to my addon hosted here (Lei Shen Coordinator". I have looked at literally a dozen or so other addons for placing charms and markers but am so brain addled by looking at so much coding I am about to tear my hair out. Just for some background, I actually started out as a computer programmer back in the mid 70's and now am getting back into it thru xml / lua coding. I have spent hours looking things up on this website and via google until my eyes are sore.

I simply want a simple "press this button and world marker blue is on your cursor to place it." The same with green, purple and red (separate buttons and scripts for each).
I have many books in reg and PDF format but none deal with this and the addons that I have found make things so much more complicated to try to figure out which part is really doing the work of activating the marker for placement.

Thanks in advance for any help.
Lazare