Adding a subgroup to a group?

I am building a very complex multi page form and I am curious if there is some kind of way to add a group to a group? Basically, I have 4 subsections that are exactly identical and would like to put this in a foreach loop (I am using smarty for rendering). It would be ideal if I could just add the elements to a group, then add it to another. Basically something like this would be an input name (using the normal php convention for form fields being converted to array index): name="asset[0][type]" so I could just do something like: {foreach from=$assets item=asset} {$asset.name.label}{$asset.name.html}<br/> {$asset.type.label}{$asset.type.html}<br/> .. and so on ... {/foreach} At worst, I'll just copy&paste for now. :( Thanks, JC