My advice is, don't try. I'm not aware of any remotely decent wireless speakers, surround or otherwise. Plus, your current setup has your main fronts on a different plane than your center, which is not ideal, to say the least.
I suggest you consider a different route:
http://www.yamaha.com/yec/ysp1/idx_concept.htm
All your "speakers" are in a row, right under your monitor. It appears that you can add a subwoofer. The YSP-1 is being phased out in favor of the 800 and 1000. This isn't an audiophile solution, but as you said, you're not an audiophile. You're looking for a way to have a home theater experience without stringing cables all over the place, and this might just be the ticket.
I suggest you consider a different route:
http://www.yamaha.com/yec/ysp1/idx_concept.htm
All your "speakers" are in a row, right under your monitor. It appears that you can add a subwoofer. The YSP-1 is being phased out in favor of the 800 and 1000. This isn't an audiophile solution, but as you said, you're not an audiophile. You're looking for a way to have a home theater experience without stringing cables all over the place, and this might just be the ticket.