Replied 8 September 2017, 2:50 pm EST
Once you have set the datasource of Spread, you can add your own columns later simply by increasing the ColumnCount of the sheet. You can refer to the following link for further clarification:
Later, when you want to have images in all the cells, then you would need to set the celltype of each cell to ImageCellType and assign an image to each cell, this link would help you with the same:
I would like you to know that you can bind the Spread with specific columns of the table, you need not hide the columns if you do not want them to be there in the bound Spread. This link would guide you ahead with the same:
Hope it will help you. Please let me know if you have any queries further.