Sounds like you are looking to 'fetch' two different sets of information for each of your separate menus.
With two different fetches, you would want to fetch a range limit for the first and a fetch offset for the second. The difference between the two fetches representing the display break between the two ...
I would focus on learning to use eZ publish template language constructs to retrieve information from the database and display this information, then work on structure or layout.
In the end your going to find the best help is learning to write eZ publish template code and use the 'fetch' function.
There are a number of example menu extensions you can use as examples, http://ezpedia.org/wiki/en/ez/extensions
There are even more example snippets of template code to create custom menu templates, search ez.no forums for example code.
