Hi,
You can have all your HTML files in your project, but only reference the filenames of the ones you want to show for each group in a CSV file.
By default, PennController relies on Ibex’s internal counter which gets incremented whenever a participant finishes the experiment. The Template command will use that counter to select the rows corresponding to a specific group, in a cycling way. If you have one table with 4 groups (say A-D) and another one with 3 groups (say A-C), then the groups will match for the counter’s values 0, 1 and 2, but when the counter reaches the value 3 then it will move on to group D for the first table and go back to group A for the second table, and so on.
Here is a project that illustrates these two points: https://farm.pcibex.net/r/ZzqAbG/
Jeremy