Yes,
In the builder, you can add as many bricks as you want, reffering to the possible context. Means that you cannot merge a grid brick and a fly or form brick.
BUT, if you want to do this, it is extremly simple in your source code.
TODO :
- Create the bricks you want to merge, in two different layouts with Cook
- Then, in the view.html.php file, have a look on how the datas are loaded
- Have a look in the main layout file (ex: tmpl/default.php)
- Merge all this !!!
The only files you have to modify and the VIEW and the LAYOUTS.
If you have difficulties, please comment here your tries and where you block.