It depends on the adapter that is inside of them. If they are Intel ones...ie 3945ABG or lower, then no...it won't.
Anything higher than that will support 40Hz bands.
Do not use 5 GHz indoors. It's not very good, PERIOD. 2.4Ghz is the sweet spot. Use higher up channels, and disable auto channel scan to manually select. Best channels are either 1, 6, or 11.
You should start your own topic, since you aren't the OP. And you haven't quite told us what your problem was.