For instance. I am trying to create a macro to properly align variables and operations for a 2x2 system of equations like below.

I have created a .ts file in the proper directory for style packages in Windows (c:\users\michael\appdata\roaming\TeXmacs\packages) and have created some simple macros that work. 

What I am trying to do is make the macro process as simple as possible. First I start out in a regular Texmacs Window, Create a displayed equation, use the Table menu in math mode to input a Stack, Do structured adds to make 5 columns, then set all odd columns to right justify. Viewing  source I get

 .

I would like to be able to copy and paste this code into an Assign, but nothing seems to work. 

I have tried using Assign with Macro in various combinations but no luck. 

Some time ago I did a similar modification of the eqnarray* environment and only got it work but looking up and modifying the eqnarray* code directly. I can still do this but am looking for a shortcut.