Hey HB,
Theoretically you could receive out of the bands if you could pull a software mod that would do it. It only seems that you will get from 137-180ish, then 400 to 500ish, depending on what Wouxun you have and what export configurations it has.
You would also need a proper antenna to receive the frequencies you wanted to listen to. Considering that an antenna is just a piece of wire tuned to the desired frequency, you'd just want to have it cut to the right size to match the band.
I also own a Kenwood TH-F6A which has amazing receive capabilities and can also receive AM, Wide FM, SSB and CW. You can listen to everything from DC to Daylight essentially, but you won't hear much on SW bands unless you use an external wire antenna or are listening to nearby stations....