Mr. Malty recommends .8 vials for 1 gallon of 1.050. At 55-60F you definitely developed some diacetyl and esters. Being it was in the basement for 6 weeks, it probably cleaned up a good amount so if it was at 55F you are much better off than if it was 60F. At 60F you are going to have more of a hybrid. It also depends upon the yeast. Some do better at higher temps than others and keep their lager characteristics.
All that said, I agree it's time to rack and lager, or you can bottle lager if you have the room. That would be my MO, bottle it, let it sit for 2 weeks at room temp, put it in the fridge and forget about them for another 6-8 weeks before a taste test.
Dave