When the Wii first came out, a popular topic was that you didn't even need the sensor bar. I remember one person used 2 candles placed where the sensor bar would be, and it actually worked better.
Perhaps try something like that?
If you don't want to do that, though, it doesn't have to be right against the screen, but it depends how far you are going to be from it.
There is a possibility that you can put it on the floor, as close to the screen as you can get, and just set the sensor bar to "Below TV".
Of course this does depend a lot on how far you are going to stand, and such.
Any more information you can give me would be helpful.