Should be no problem, assuming your computer has the spare USB ports already.
I know that in certain versions of windows (I've seen in in Windows7) -- that you sometimes have to disable to power-save on the USB ports, or it'll go ON and OFF ... and basically be unreliable. The fix is documented in the forums here already -- the symptoms are a USB port that disappears after being left on a certain amount of time ... usually when the computer isn't being used.