[development] Form fields in a table

Using FAPI for a form (D6), and in the form is a markup field, which is a table created with theme(). Some of the cells in the table need to be populated with form fields. The contents of the table is being sent to theme() as $rows, and I've tried having the cells in question defined as $form[myfield] that has been created earlier, but I end up with an empty cell, and the form field appearing where it was first defined, prior to the table... so... $form[myfield] = array(... $rows[this_row] = array(cellval, cell2val, $form[myfield] ... isn't working. I need something like Row 1 text text selectbox text textfield text