let's not forget the mixer or phono pre-amp to correct the distorted sound because the signal off the phono-out is high in the highs and mid-range frequencies, but low in bass
that's why i mentioned the search function because this has been discussed often and is an important part, or the next thread would be "hey i've connected everything properly but the volume's too low and it sounds distorted"
get a phono amp or dj mixer to run ur tables thru from there run it to ur soundcardand record via ur favorite audio editor i wouldnt suggest using the NNXT tho sample based programs are much easier such as Acid or Fruity Loops