How can I make a cell "transparent" if a formula is FALSE?

A1 says "This sentence is too long", B1 has a formula.
When B1 is true, A1 is blank.
B1 has =IF(A2="Yes", 1, "")

My problem is, when B1 is false, it displays like this:
| This sentence is |___________|
( ____ being a blank B1)

If B1 is false, I would like it to continue to display the contents of A1 through B1, the way it would if B1 was completely blank. For the cell to be "transparent"

I guess my IF statement is returning "", which excel interprets as data. How can I make this work?

(changing cell widths is not an option, maybe changing the IF statement? conditional formatting?)

I'm using excel 2002. Thanks for your help!