You'll probably get a decent amount of fruityness by using lager yeast at that temp... it'll still ferment, but it's probably not what you're looking for.
I'd really recommend a clean ale yeast over a straight-up lager yeast at those temps (see the OktoberFAST thread
for a great recipe brewed with Safale S-04).
Alternately you could use something like a steam beer yeast or kolsch yeast (but even with that it's better to keep it in the mid-60s). I've brewed oktoberfast (using S-04), a kolsch (with WLP-029 kolsch yeast), and a helles (using WLP-810 steam lager yeast) at basement temps, had good results all three times.
If you're really set on the idea of using lager yeast, look into a chiller like son of fermentation chiller
. Supposedly works pretty well, but I don't have direct experience.
Either way, you're going to end up with drinkable beer. Have fun!