If you're gutsy, why not just put them under the carpet? Just take a small pair of pliers to one corner and pull. The carpet should come up. Just pull it back. Use box knife or something to cut the pad and sandwich the wire in the pad. Tape up with masking tape or something where you cut (over the wire) and put the carpet back down and tuck the carpet back under the baseboard with a dull knife or something.
I've done this a lot in the past with surround wiring in a living room. My dad used to install carpet and such and this is what he did. Depending on the quality of the carpet and pad, you won't even feel the wire when you walk over it.
Alternately, you could pull the pad up, too. Place the wire directly on the concrete and put the pad over it. It'd be easier but you're more likely to feel it (and see it) as opposed to it being sandwiched in the cut on pad.
Of course, if you have thin carpet and/or pad, this would only serve to hide it. You would both see and feel the cable if you had thin carpet/pad.
Anyway, this is just another option. Lots of options to choose from.