🚀 go-pugleaf

I've been experiencing for several days on the following brainteaser: 
I want to produce a document on a page (landscape) divided in two, the left side (about 1/3) being a brief and generic explanation, and the right side (about 2/3) a detailed description in a table format. Writings on the left side are a few lines long, while the tables may be several pages long. The text begins on the left side, continues in a table on the right side, and the table flows on the following pages. Some of the table rows are tagged as conditionnal text. 

How can I do? 

1. I tried using two master pages... one with two text boxes tagged flow A, the second one with only one text box => but that implies reapplying master pages all the time as I add and edit the tables, and later when I hide the conditionnal text. As I will need to edit and re-create this document regularly in about 10 languages, I need to keep the DTP process as simple as possible. 

2. I tried with a table expanding on the whole page, using my usual table, and adding a straddled column on the left with no ruling, and pasting the text that goes on the left in that column => but that causes problems with the conditional text (empty line except for the left column cell). 

3. I tried to put a table in the table, i.e. a simple table (no ruling, 2 columns, several lines) in the left column, and my elaborate table (including its 3 columns, different row shadings, conditional text, heading, title) in the right column. That seemed the best solution, except for the fact that FrameMaker does not automatically break a single table row on two pages. Currently, the principal table has a single row on a page, and the sub-table in the right column should extend on several pages. Except that it does not. What should be on the following pages is hidden. 

Has anybody got other ideas? Did I miss something in my third attempt? 

Thank you for your help and time. 

Brigitte (France)