What command to abutt objects together on X axis to remove gaps between them?

[Steve1]

Hi,
V5
If I follow this post of yours,

Running Python scripts from aliases or toolbar buttons

First, here is some basic info from the Rhino developer docs. Following are some more detailed instructions. They are platform-specific. For Windows Rhino users: To run a python script (*.py) from a toolbar button: Right-click in a blank space in any toolbar and choose “New Button”. In the button editor that opens, in the "Command area, type the following: ! _-RunPythonScript ( <paste the entire script here> ) Then OK to exit the button editor. When you click the button, the script sh…

and make a button, I can then use that.
Not sure how I make a command I could type.
AbuttObjects which would run that.

I have created a new button, I have the .py file sitting in afolder on my D drive, just what do I do next, googled this cant fathom it out at all. They dont say if one drag drops it into rhino, or if one selects it in the windoes folder and hit ok, and what one then gets hold of to paste into the bit in the tut that says paste script here.
Completely baffled.

Steve