I just bought a house that was built in 1952. the living room was converted to an indoor room from a garage. when we bought the house the room was carpeted and the carpet was covered in cat urine. after we ripped up the carpet we discovered that the sub-floor was damaged badly from the cats. after pricing we reasoned that it would be best and more cost effective to rip out the old sub-floor and replace it. i'm wondering what the best way to go about doing this would be. looking to save as much money as possible, but not have to resort to using substandard materials. we are planning on putting down new carpet,if any one has any tips on how to do that ourselves (there is some carpet laying experience in our crew of helpers) it would be greatly appreciated!