Everything works! Thanks.

Do you happen to know an answer to my second bonus question? (It was the one about setting a cell to be "skipped" when tabbing)

Also, I've noticed that if I decide to change my mind and not set rigid parameters on cell size that if I add content to the cell, the underline expands accordingly. However, even if I put in tab characters enough to fill the cell, when it expands, the bottom underline line will never fully fill the cell unless I manually adjust it. Is that unavoidable?