Hello s1lver!
You check out this link:
http://demo.joomlart.com/extensions15/index.php?option=com_content&view=article&id=109&Itemid=54
That’s a JA Tab’s demo, you can see how it work.
You want to setup ja_bulletin module more than once, and display them by ja_tabs:
Have two the solution:
1, You copy ja_bulletin folder with the amount of what you expected, you rename them and change some configuration in XML setup file in each folder. Finally, You zip them and login Administrator system to install. You can refer to Example 2 in JA Tab’s Demo.
=> With this solution, it’is very difficult, not optimal, you have knowledge of Joomla system and PHP language.
2. You login adminstrator, go to module manage menu >> choose ja_bulletin and click button copy in toobar menu. You setup them with another position, You refer to Example 1
Good luck.