Although there will no doubt be some debate from LR fanbois about this, the only software that will properly correct for your lens is DXO. I use this as my main RAW editor, and it is superb IMHO.
There are profiles for several versions of the Nikon 18-55 lens for the D50, and for the 17-55 f2.8
The difference between DXO and LR profiles is that DXO's are lab generated and cover all apertures and focal lengths across the whole of the lens.
You can find a trial version of DXO
HERE