In portable infoboxes, I would like one section under a header (or <group>) to have a tabular layout and another section to have a stacked layout. Is that possible? If not, an alternative I would like would be to omit the left hand column of the infobox, similar to colspan="2"
By tabular, I am guessing the OP means label on the left, data on the right. Unfortunately, I don't believe this is possible as the stacked/tabular is specified only for the entire infobox. However, as TableWiz showed, you can get your left-column-free version simply by omitting the label.