As far as adding a column to the end of all of the columns, I don't believe you can do that. I have only been using crystal for a couple of months now, and have built an income statement for my company, and have not come across, in the literature that I have read, anybody adding a final column after the total column. But, when you set up your crosstab, you will notice that by default it will total all of the columns on the bottom row. And it will total all of the rows in the final column. Hope this helps.
Dan